Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USAi
| Regional Level Types | |
|---|---|
| Gillette Quarry (J-J Mine; Haddam Neck Quarry) | Quarry |
| Haddam Neck | Village |
| Haddam | Town |
| Middlesex County | County |
| Connecticut | State |
| USA | Country |
This page kindly sponsored by Robert C. Hindle
Latitude & Longitude (WGS84):
41° 29' 32'' North , 72° 30' 38'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Higganum | 1,698 (2017) | 3.9km |
| Moodus | 1,413 (2017) | 5.2km |
| East Haddam | 9,042 (2017) | 6.0km |
| East Hampton | 2,691 (2017) | 9.3km |
| Chester Center | 1,558 (2017) | 11.2km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Lapidary and Mineral Society of Central Connecticut | Meriden, Connecticut | 25km |
| New Haven Mineral Club | New Haven, Connecticut | 40km |
| Bristol Gem & Mineral Club | Bristol, Connecticut | 42km |
The Gillette Quarry operated intermittently between 1895 and 1944. The quarry is named after its first owner, Merit P. Gillette, who opened the quarry in the fall of 1895 and found the first elbaite crystals on December 1 (Davis, 1901). The quarry was eventually worked for gem tourmaline, mineral specimens and commercial grade feldspar. According to a newspaper article (Anonymous, 1932), beginning in 1904 the quarry was leased to the Eureka Mining and Operating Company of Trenton, NJ and produced up to 65 tons of feldspar a day for about 12 years. Cameron et al (1954) says it was closed by 1914 (some references from around that time call it the "Haddam Neck Quarry") but says it was worked again for three months in 1934 by B. E. Johnson of Haddam. A newspaper article (Anonymous, 1932) from December 23, 1932 says the Sterling Gillette was reopening the quarry and that the feldspar was being sent to Bon Ami in Manchester, Conn. It also notes that "New machinery is being installed by Mr. Gillette for the grinding of feldspar at the old plant of the Tidewater Feldspar Company [at Rock Landing], now owned by Mr. Worth of Middletown." Cameron et al (1954) notes that the last operations were by B. E. Johnson of Haddam and E. H. Johnson of Middletown (as the "J-J Mine") from November 1942 to November 1944. It has been idle since then. Contrary to some photo descriptions, it has not been lost to development. It is on the same private residential property it has always been on, but it is not open to collecting.
When it was opened, in the eastern USA only the pegmatites of Maine produced pocket elbaite crystals, so the abundant elbaite crystals from Gillette soon found their way into museums world-wide. They were systematically mined from 1898 to at least 1901 by Ernest Schernikow of New York City, who would happily give permits for others to collect (Davis, 1901). A photo of it from this period appears in Farrington (1903) https://www.mindat.org/photo-843207.html Horace Williams worked there and sold many crystals to George English, whom he later worked for. Anonymous (1932) states that M. P. Gillette gave a collection of about 300 crystals to Wesleyan University and that Yale Peabody Museum obtained much material. Gem material was purchased by George F. Kunz, Director of the US Bureau of Mines and purchasing agent for the Tiffany Company of NYC. John Pierpont Morgan obtained a large collection of material from Gillette that is now housed at the American Museum of Natural History in NYC.
According to Scovil (1992):
The workings consist of two open crosscuts leading to a very irregular open cut 108 meters long. These cuts expose a complex pegmatite consisting primarily of steeply dipping, interconnecting lenses that strike N 35° W. The pegmatite is exposed along its strike for about 100 meters, and varies in thickness from 5 to 25 meters. The walls of the pegmatite are characterized by irregular rolls or ridges most of which plunge gently north, and by sharp bends that are related to joints.
The pegmatite is complexly zoned and is lithium-bearing. Miarolitic pockets are most prevalent in the western cut. According to Sterling Gillette (1937) pocket size varied:
from that of an egg or less up to a barrel or larger. The pockets were formed with an inside lining of quartz crystals and were usually about half full of decomposed rock formation. Always wet, the minerals found in the pockets were standing on end and unattached to any matrix. In some pockets there were found as many as 600 crystals of tourmaline ranging in size from that of a needle to that of a pencil or larger.
Davis (1901) provides an early and comprehensive description of the elbaite crystals:
Occurring in the granite at irregular places, cavities are encountered lined generally with quartz and albite crystals, on which the tourmalines are found. To enumerate their colors would simply be to mention the range of the spectrum. Green predominates, from lightest shade to the darkest. Pink comes next, then yellow, white, blue, etc.
The largest crystal found was pale green, of uniform color, and about ten inches long, 1 inch thick at the base, tapering to about three-quarters of an inch. A few crystals have been found nearly two inches in diameter, and from that size, down to the diameter of a hair.
One crystal was green, eight inches long, doubly terminated, and yellow at one end. Another green, six, inches long, doubly terminated, and 1 1/2 inches thick. Another three inches long, 1 inches thick, half its length green, and the other terminated end a deep pink.
One seven inches long, less than 1/8 inch thick (about like a darning needle), of clear light green color. Several good sized green crystals, with both terminations pink, and also several yellow at one end and blue at the other.
One crystal showed five colors, white, pink, yellow, green and blue. Crystals observed of single or combined colors were: white; white and pink; green, yellow, blue green; green with terminations of pink, yellow and blue; white and blue; yellow with terminations of pink; green and white (one crystal having both terminations white; pink; pink with termination of white; green with dark blue termination.
The colors mentioned vary from light to dark. Usually these combinations are well defined with sharp lines of demarcation, each color running part of the length of the crystal. In other instances the colors blend so softly that it is impossible to distinguish where the one ends and the other begins. Then again the different colors run parallel with the prism, as shown by cross sections that have been cut.
Professor Penfield says that the variation of colors are due to the varying quantities of magnesia and iron. Better than any possible description are the crystals themselves. Unfortunately most of the crystals are broken in blasting, often so badly as to be beyond repair. Yet withal, considering the force needed to break the rock, they are fortunate to get so many that lose so little of their beauty in restoration.
A glance at the crystals would lead one to think that quite large gems might be cut from them. This is not so, however, for they have not been able to get any perfect gems over one carat of weight. One very interesting and new effect has been observed in cutting some of the pieces en-cabachon. That is, a perfect cat’s-eye, equal to the famous chrysoberyl cat’s-eye from Ceylon.
The largest crystal found was pale green, of uniform color, and about ten inches long, 1 inch thick at the base, tapering to about three-quarters of an inch. A few crystals have been found nearly two inches in diameter, and from that size, down to the diameter of a hair.
One crystal was green, eight inches long, doubly terminated, and yellow at one end. Another green, six, inches long, doubly terminated, and 1 1/2 inches thick. Another three inches long, 1 inches thick, half its length green, and the other terminated end a deep pink.
One seven inches long, less than 1/8 inch thick (about like a darning needle), of clear light green color. Several good sized green crystals, with both terminations pink, and also several yellow at one end and blue at the other.
One crystal showed five colors, white, pink, yellow, green and blue. Crystals observed of single or combined colors were: white; white and pink; green, yellow, blue green; green with terminations of pink, yellow and blue; white and blue; yellow with terminations of pink; green and white (one crystal having both terminations white; pink; pink with termination of white; green with dark blue termination.
The colors mentioned vary from light to dark. Usually these combinations are well defined with sharp lines of demarcation, each color running part of the length of the crystal. In other instances the colors blend so softly that it is impossible to distinguish where the one ends and the other begins. Then again the different colors run parallel with the prism, as shown by cross sections that have been cut.
Professor Penfield says that the variation of colors are due to the varying quantities of magnesia and iron. Better than any possible description are the crystals themselves. Unfortunately most of the crystals are broken in blasting, often so badly as to be beyond repair. Yet withal, considering the force needed to break the rock, they are fortunate to get so many that lose so little of their beauty in restoration.
A glance at the crystals would lead one to think that quite large gems might be cut from them. This is not so, however, for they have not been able to get any perfect gems over one carat of weight. One very interesting and new effect has been observed in cutting some of the pieces en-cabachon. That is, a perfect cat’s-eye, equal to the famous chrysoberyl cat’s-eye from Ceylon.
The quarry also is noted for an abundant, pink, fibrous variety of muscovite called schernikite, usually forming parallel overgrowths on lepidolite and normal muscovite or as long, rhombic fibers coating and penetrating pocket crystals. Other noteworthy minerals are morganite overgrowths on cores of pale green beryl, often doubly-terminated by pinacoids and modified by pyramidal faces; amazonite; purple masses of lepidolite; euhedral gem fluorapatite; cassiterite; microlite; and topaz.
The wall rock consists of interbedded quartz-mica schist, mica-quartzite, calc-silicate gneiss and marble and minerals found there are included in the list below.
Cameron and others (1954) describes the zoning in the eastern and western portions of the pegmatite:
Western part. - The sequence of zones inward from the walls, is as follows:
1. Border zone, ½ inch to 18 inches thick, composed of fine-grained quartz, [albite] plagioclase, muscovite, garnet and black tourmaline. The zone is present wherever the contact between pegmatite and wall rock is visible.
2. Wall-zone, sheet-mica bearing, ½ foot to 6 feet thick, composed chiefly of quartz and plagioclase with subordinate [microcline] perthite and muscovite and accessory green apatite and black tourmaline. Muscovite probably constitutes less than 5 percent of the zone. The unit is discontinuous and its distribution is best indicated by the geologic map.
3. Perthite-quartz zone, 10 to 45 feet thick, composed of white and salmon-pink perthite, pale green milky quartz, and graphic granite, with subordinate plagioclase and green muscovite (mostly books ¼ to 1 inch across), and accessory black tourmaline, green and rose beryl, red fluorite, apatite and lepidolite. Some of the quartz is granular (grain size ¼ inch) and occurs in branching, vein-like bodies which may have replaced other minerals of the zone. Albite, green tourmaline, green fluorescent apatite and green muscovite flakes are associated chiefly with the granular quartz. Cavities, 1 to 5 inches broad, are common only in this material. The cavities are lined with euhedral muscovite, albite and quartz crystals. At point A, several books of scrap muscovite, 1 inch broad and 5 inches thick, occur in a mass of granular quartz.
Eastern part. - The walls of this part of the pegmatite in this area are characterized by deep rolls in places, especially northward from point D. The sequence of zones in this part of the pegmatite, inward from the walls, is as follows:
1. Border zone, ½ inch to 10 inches thick, similar to border zone in the western part of the pegmatite.
2. Quartz-plagioclase-perthite wall zone, 4 to 6 feet thick, composed of coarse-grained quartz, perthite and massive plagioclase with subordinate cleavelandite, black, green, and pink tourmaline, scrap muscovite and traces of pink lepidolite (some of the variety schernikite), pale green apatite, red fluorite, and green and rose beryl. The subordinate minerals commonly occur together in irregular masses in which are numerous small cavities. The unit is present for about 30 feet northward from point D. The zone was covered by water at the time of latest mapping.
3. Intermediate zone, sheet-mica bearing, 2 to 6 feet thick. This consists of quartz, plagioclase, perthite and muscovite with accessory garnet, black tourmaline and green apatite. The hanging wall part has an average thickness of 4 feet, and is more uniform in thickness and richer in mica than the footwall part. The zone is very lean along both walls of the pegmatite at the southern end of the quarry.
4. Quartz-plagioclase-perthite intermediate zone, 3 to 5 feet thick, composed of coarse quartz, subordinate plagioclase and perthite, and accessory black tourmaline and muscovite (books 1 inch broad). This zone is exposed only in the southernmost face of the cut, where it lies adjacent to both parts of the wall-zone.
5. Perthite-quartz intermediate zone, 4 to 20 feet thick, similar to the perthite-quartz zone of the western part but with less graphic granite and less granular quartz and associated minerals. Perthite occurs in larger masses; some are nearly pure anhedral crystals 5 feet long.
6. Quartz-perthite core, maximum thickness about 35 feet. About 85 percent of the unit consists of granular milky quartz (1/8 to 1 inch grains): coarse-grained (crystals 5 inches to 4 feet in diameter) white to pink perthite anhedra make up almost 10 percent. Green muscovite (books ¼ to 1/8 inch broad), black tourmaline, pale green apatite, and red fluorite make up the remainder of the zone. The margins of some of the perthite masses have replaced quartz and the minor minerals. No evidence could found, however, to indicate whether replacement occurred on a large scale at the expense of pre-existing pegmatite, or was merely a minor process in the development of the core.
1. Border zone, ½ inch to 18 inches thick, composed of fine-grained quartz, [albite] plagioclase, muscovite, garnet and black tourmaline. The zone is present wherever the contact between pegmatite and wall rock is visible.
2. Wall-zone, sheet-mica bearing, ½ foot to 6 feet thick, composed chiefly of quartz and plagioclase with subordinate [microcline] perthite and muscovite and accessory green apatite and black tourmaline. Muscovite probably constitutes less than 5 percent of the zone. The unit is discontinuous and its distribution is best indicated by the geologic map.
3. Perthite-quartz zone, 10 to 45 feet thick, composed of white and salmon-pink perthite, pale green milky quartz, and graphic granite, with subordinate plagioclase and green muscovite (mostly books ¼ to 1 inch across), and accessory black tourmaline, green and rose beryl, red fluorite, apatite and lepidolite. Some of the quartz is granular (grain size ¼ inch) and occurs in branching, vein-like bodies which may have replaced other minerals of the zone. Albite, green tourmaline, green fluorescent apatite and green muscovite flakes are associated chiefly with the granular quartz. Cavities, 1 to 5 inches broad, are common only in this material. The cavities are lined with euhedral muscovite, albite and quartz crystals. At point A, several books of scrap muscovite, 1 inch broad and 5 inches thick, occur in a mass of granular quartz.
Eastern part. - The walls of this part of the pegmatite in this area are characterized by deep rolls in places, especially northward from point D. The sequence of zones in this part of the pegmatite, inward from the walls, is as follows:
1. Border zone, ½ inch to 10 inches thick, similar to border zone in the western part of the pegmatite.
2. Quartz-plagioclase-perthite wall zone, 4 to 6 feet thick, composed of coarse-grained quartz, perthite and massive plagioclase with subordinate cleavelandite, black, green, and pink tourmaline, scrap muscovite and traces of pink lepidolite (some of the variety schernikite), pale green apatite, red fluorite, and green and rose beryl. The subordinate minerals commonly occur together in irregular masses in which are numerous small cavities. The unit is present for about 30 feet northward from point D. The zone was covered by water at the time of latest mapping.
3. Intermediate zone, sheet-mica bearing, 2 to 6 feet thick. This consists of quartz, plagioclase, perthite and muscovite with accessory garnet, black tourmaline and green apatite. The hanging wall part has an average thickness of 4 feet, and is more uniform in thickness and richer in mica than the footwall part. The zone is very lean along both walls of the pegmatite at the southern end of the quarry.
4. Quartz-plagioclase-perthite intermediate zone, 3 to 5 feet thick, composed of coarse quartz, subordinate plagioclase and perthite, and accessory black tourmaline and muscovite (books 1 inch broad). This zone is exposed only in the southernmost face of the cut, where it lies adjacent to both parts of the wall-zone.
5. Perthite-quartz intermediate zone, 4 to 20 feet thick, similar to the perthite-quartz zone of the western part but with less graphic granite and less granular quartz and associated minerals. Perthite occurs in larger masses; some are nearly pure anhedral crystals 5 feet long.
6. Quartz-perthite core, maximum thickness about 35 feet. About 85 percent of the unit consists of granular milky quartz (1/8 to 1 inch grains): coarse-grained (crystals 5 inches to 4 feet in diameter) white to pink perthite anhedra make up almost 10 percent. Green muscovite (books ¼ to 1/8 inch broad), black tourmaline, pale green apatite, and red fluorite make up the remainder of the zone. The margins of some of the perthite masses have replaced quartz and the minor minerals. No evidence could found, however, to indicate whether replacement occurred on a large scale at the expense of pre-existing pegmatite, or was merely a minor process in the development of the core.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
42 valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc. 3 erroneous literature entries.
Detailed Mineral List:
| ⓘ Actinolite Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 Colour: dark green Description: With vesuvianite and other calc-silicate minerals in a vein in the gneissic wall rock. Found by Schooner in 1953 and 1954. |
| ✪ Albite Formula: Na(AlSi3O8) Habit: either flattened parallel to b {010} or elongated parallel to x {bar101}, and aggregated in parallel or twin-position to form a group which presents the aspect of a large crystal elongated in the direction of the axis b. Colour: colorless to white Description: A major component of the pegmatite, but also lining miarolitic cavities with clear, colorless to white, well-developed crystals to 2.5 cm in diameter, sometimes displaying a beautiful opalescence (Scovil, 1992). References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ✪ Albite var. Cleavelandite Formula: Na(AlSi3O8) Habit: tabular Colour: white to colorless Description: Significant component of the pegmatite. Excellent crystals, an inch or more in diameter, have come from cavities. |
| ⓘ Albite var. Oligoclase ? Formula: (Na,Ca)[Al(Si,Al)Si2O8] Description: Included in a list of minerals with no supporting documentation, may have been included because of the opalescence of some pocket albite. Pegmatitic core albite tends to be more pure (less than An5) than the oligoclase compositional range (An10-30), though it may reach it along the wall or border zones; also common in the regional metamorphic rocks. |
| ⓘ Almandine Formula: Fe2+3Al2(SiO4)3 Habit: trapezohedra, sometimes flattened, with dodecahedral modifications Colour: maroon Description: crystals to 1 cm, and occasionally gemmy, flattened crystals in muscovite books |
| ⓘ Annite Formula: KFe2+3(AlSi3O10)(OH)2 Habit: tabular Colour: black Description: fka biotite, a very rare accessory in the pegmatite |
| ⓘ 'Axinite Group' ? Description: Included in a list copied from Schooner (1958) but with no supporting details. May have occurred in the calc-silicate vein found in the gneissic wall rock. |
| ✪ Beryl Formula: Be3Al2(Si6O18) Habit: elongated hexagonal prisms, terminated with pinacoids and partial pyramids {11bar21} Colour: yellow, peach, pale green, pink overgrowths on pale green cores, aqua, colorless Fluorescence: blue-white Description: Crystals to 2 feet (60 cm) across have been found. Most typical are colorless to pale green or pink overgrowths on pale green cored ("reverse watermelon") crystals, usually less than 15 cm long. Commonly frozen in quartz and associated with fluorapatite, cleavelandite, elbaite. Pocket crystals rare. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ✪ Beryl var. Aquamarine Habit: hexagonal prisms Colour: pale blue Description: Subordinate in quantity to the typical pale green and pink beryl, but gem quality crystals were found and cut. Some highly etched crystals also exist. References: |
| ✪ Beryl var. Goshenite Formula: Be3Al2(Si6O18) Habit: elongated hexagonal prisms, terminated with pinacoids and partial pyramids {11bar21} Colour: colorless Fluorescence: blue-white Description: Beryl crystals to 2 feet (60 cm) across have been found. Crystals usually less than 15 cm long. In large crystals, color grades from colorless to rose externally with pale green cores. Commonly frozen in quartz and associated with fluorapatite, cleavelandite, elbaite. Some gem material in smaller crystals from pockets. |
| ✪ Beryl var. Morganite Formula: Be3Al2(Si6O18) Habit: elongated hexagonal prisms, terminated with pinacoids and partial pyramids {11bar21} Colour: pink, commonly with green cores Description: Beryl crystals to 2 feet (60 cm) across have been found. Crystals usually less than 15 cm long. Color zoning in large crystals typically consists of colorless to rose externally, with pale green cores. Commonly frozen in quartz and associated with fluorapatite, cleavelandite, elbaite. Some pocket gem material. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ⓘ Calcite Formula: CaCO3 Habit: massive Description: In the calc-silicate vein with vesuvianite in a vein in the wall rock. References: |
| ✪ Cassiterite Formula: SnO2 Colour: dark brownish black Description: good crystals to 1 cm, can be highly modified, lustrous, microcrystals in cleavelandite |
| ⓘ Chalcopyrite Formula: CuFeS2 Habit: anhedral Colour: iridescent Description: Micro grains in albite. References: |
| ⓘ Formula: BeAl2O4 Description: Actually from the Chrysoberyl locality (Harold Moritz info). |
| ✪ Columbite-(Fe) Formula: Fe2+Nb2O6 Habit: elongated tabular prisms Colour: black with iridescence Description: Well-formed iridescent crystals to 2 cm long, usually enclosed in microcline. The identification was made by Petr Cerny at the University of Manitoba, using microprobe analysis (Scovil 1992). |
| ✪ Cookeite Formula: (LiAl4◻)[AlSi3O10](OH)8 Habit: globular masses of radial hexagonal plates Colour: yellowish-white Fluorescence: yellow Description: Globules typically a few mm across, encrusting pocket albite, smoky quartz, microcline, lepidolite, elbaite terminations. When naturally removed, leave hemispherical pits on quartz crystal surfaces. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ⓘ Diopside Formula: CaMgSi2O6 Colour: light green Description: With other calc-silicate minerals in a vein in the gneissic wall rock. Found by Schooner in 1953 and 1954. |
| ⓘ Dolomite Formula: CaMg(CO3)2 Habit: massive Colour: white, green to black Description: With the calc-silicate vein found in the wall rock in 1953-4 by Dick Schooner. |
| ✪ Elbaite Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) Habit: Elongated trigonal prisms, antilogous pole terminated with rhombohedral pyramids {1bar11}, analgous pole dominated by a pedion. Colour: prisms mostly green, blue-green, rarely pink. Terms. green, yellow, pink, blue, combinations Description: Hundreds of crystals in some pockets, often "piercing" smoky quartz. Flawless crystals are rare; usually fractured. Large pocket crystals vary but are usually striated to silky, slender and elongated, from small needles up to 30 cm, but typically a few cm long. Color zoning is usually longitudinal, short and terminal in shades of green, pink, golden yellow and blue with up to 5 colors. Antilogous poles typically pale green, yellow, pink; analogous poles usually colorless, pale green, aqua. w/thin indigo cap, or sometimes with a narrow pale colored zone immediately beneath and parallel to the pedion. Tiny crystals may be any color throughout. Concentric “watermelon” zoning is not common. Some fragments of green prisms are overgrown by later pink zones. Also found frozen in matrix with beryl, fluorapatite, fluorite, muscovite, smoky quartz, lepidolite, microlite, columbite.
|
| ✪ Fluorapatite Formula: Ca5(PO4)3F Habit: short hexagonal prisms or tabular, terminated by pinacoids with modified edges Colour: pale gray-green or rose pink to purple Fluorescence: bright yellow Description: Gray-green opaque crystals up to 2 cm common in quartz, albite, beryl, elbaite, lepidolite matrix. Translucent to clear crystals in pockets, either as stout hexagonal prisms or with a central fluorescent prism surrounded by tapered, non-fluorescent overgrowths up to a few cm across. Gray-green crystals show more forms than the rose pink to purple crystals. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ⓘ Fluorite Formula: CaF2 Habit: massive to crude octahedra Colour: red, colorless, green Fluorescence: dull green Description: massive or crude red crystals to 4 cm, associated with fluorapatite, and lithian muscovite, was frequently found in the eastern quartz-plagioclase-perthite zone. Also, colorless fluorite accompanies diopside and vesuvianite in the calc-silicate vein in the wall rock. Schooner reports little green crystals in vugs of albite. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 Ingerson, Earl (1938) Uraninite and associated minerals from Haddam Neck, Connecticut. American Mineralogist, 23 (4) 269-276 |
| ⓘ Fluorite var. Chlorophane Formula: CaF2 Habit: massive to octahedral Colour: cherry red to maroon Fluorescence: blue-green Description: Usually found as fragments due to cleavage and brittle nature, sometimes as remnants in octahedral voids in matrix. References: |
| ⓘ Goethite Formula: Fe3+O(OH) Habit: stains and crusts Colour: brown Description: As iron oxidation stains referred to as "limonite". |
| ⓘ Graphite Formula: C Habit: coatings, blebs Colour: dark gray Description: as thin seams and little rounded crystals in marginal pegmatite; as poorly developed crystals and thin irregular fracture fillings; as millimeter-sized blebs with a radiating structure on a matrix of feldspar and quartz References: |
| ⓘ Grossular ? Formula: Ca3Al2(SiO4)3 Description: Included in a list of minerals with no supporting details. May occur in the calc-silicate gneiss surrounding parts of the pegmatite. |
| ⓘ Gypsum Formula: CaSO4 · 2H2O Habit: clusters of micro crystals Colour: white to gray Description: As clusters of very delicate white or gray crystals on protected ledges of schist and gneiss, formed from the oxidation of sulfides in these rocks surrounding the pegmatite. References: |
| ⓘ Hematite Formula: Fe2O3 Habit: pseudo-hexagonal Colour: brown Description: as brown pseudo-hexagonal inclusions in muscovite, often producing fascinating patterns |
| ⓘ Kyanite ? Formula: Al2(SiO4)O Description: Included in a list of minerals with no supporting details. May occur in the metamorphic rocks hosting the pegmatite. |
| ✪ 'Lepidolite' Habit: pseudo-hexagonal crystals, granular Colour: purple Description: As distinct crystals, up to 10 cm across; as overgrowths on a core of green muscovite and in turn overgrown by parallel schernikite fibers - all cleavable as one unit. As peach-blossom red crystals, often penetrated by elbaite. Fine-grained, granular masses in matrix with smoky quartz, cleavelandite, elbatite, beryl, fluorapatite. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 Habit: octahedral Colour: black Description: as flattened inclusions in muscovite and as sharp octahedra to 1.5 cm |
| ✪ Microcline Formula: K(AlSi3O8) Habit: blocky to prismatic Colour: white and salmon-pink Fluorescence: bluish-white Description: Crystals in cavities reach 20 cm or more across, and up to 120 cm across as crude crystals in the core. One large crystal was presented to the American Museum of Natural History, NYC by E. Schernikow. As "perthite", a major component of the pegmatite in general. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| ⓘ Microcline var. Amazonite Formula: K(AlSi3O8) Habit: blocky to prismatic Colour: pale lime-green to blue-green Description: American Museum of Natural History collection contains a pale blue-green microcline crystal 20 cm across. |
| ✪ 'Microlite Group' Formula: A2-mTa2X6-wZ1-n Habit: modified octahedra Colour: brown to black Description: Crystals up to 1.1 cm, resinous, some are radioactive and surrounded by dark halos, associated with dark smoky quartz, sharp little crystals of muscovite, acicular green tourmaline, beryl, fluorite, cleavelandite. |
| ⓘ Molybdenite ? Formula: MoS2 Description: Included in a list of minerals with no supporting documentation. Does occur in small pegmatites in the area, though, so plausible. |
| ⓘ Montmorillonite ? Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O Colour: white (stained brown) Description: Pocket clay that Schooner (1958) speculates is montmorillonite. David London's 2008 book "Pegmatites" points out that miarolitic pocket clays are poorly studied, but in at least the San Diego Co. area of California includes montmorillonite plus several other species. |
| ✪ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Habit: pseudo-hexagonal tabular Colour: silvery-white to greenish Description: A major accessory of the pegmatite in general, in books up to 45 cm in diameter and 20 cm thick. Books often contain beautiful inclusions of green elbaite and black schorl, as well as hexagonal hematite platelets and flattened magnetite octahedra. Some muscovite crystals are surrounded by overgrowths of lepidolite and schernikite that cleave as a single unit. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ✪ Muscovite var. Schernikite (FRL) Formula: KAl2(AlSi3O10)(OH)2 Type Locality: Habit: Rhombic fibers in parallel or twin-position Colour: white, tan, pink Description: A variety of pink fibrous muscovite so far unique to Gillette, as described by Scovil (1992): "Bowman (1902) goes into great detail in his analysis of muscovite and lepidolite from Gillette. The two form interesting overgrowths, with pale green muscovite at the center. This core is surrounded by a sharply defined zone of pink lepidolite. The lepidolite was subsequently overgrown by pink fibrous muscovite. The fibers are rhombic in cross section and are in parallel or twin-position so that the mass can be cleaved as if a single crystal...The fibrous muscovite also occurs as inclusions in quartz crystals. The muscovite starts at a pin point in the quartz crystals interior and becomes a divergent sub-parallel bundle of fibers as it reaches the surface where it is often the preferred site for a cookeite hemisphere." |
| ⓘ Orthoclase Formula: K(AlSi3O8) Description: "The single specimen at Yale described by Scovil (1992) from the old Brush collection was labeled before results reported by Cameron, Eugene N. and others. (1954) PEGMATITE INVESTIGATIONS 1942-45 NEW ENGLAND. U.S. Geological Survey, Professional Paper 255 and Stugard (1958) Pegmatites of the Middletown Area, Connecticut USGS Bulletin 1042-Q, that show the K-feldspar of the Middletown pegmatite district to be microcline." (Harold Moritz information) |
| ⓘ Phlogopite ? Formula: KMg3(AlSi3O10)(OH)2 Description: Included in a list of minerals with no supporting information. May occur in the calc-silicate gneiss surrounding part of the pegmatite. |
| ⓘ Pyrite ? Formula: FeS2 Description: found rarely as small crystals and masses often altered to “limonite” |
| ⓘ ' Formula: A2Nb2(O,OH)6Z Description: Included in a list of minerals with no supporting information. |
| ⓘ Formula: Mn4+O2 Description: No pyrolusite dendrite or staining in a granite pegmatite in the world has been verified as pyrolusite. The name was a mistake in the nineteenth century which has been widely publicized. |
| ⓘ Pyrrhotite Formula: Fe1-xS Description: Schooner (1958) reports "one distinct little crystal" |
| ⓘ Quartz Formula: SiO2 Habit: massive Colour: white to colorless Description: Major component of the pegmatite in general, though most of it is the smoky variety, especially the pocket crystals. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ⓘ Quartz var. Rose Quartz Formula: SiO2 Habit: massive Colour: pink |
| ✪ Quartz var. Smoky Quartz Formula: SiO2 Habit: hexagonal prisms with rhombohedral terminations, sometimes flattened or etched, or oddly shaped overgrowths on earlier fragments Colour: pale gray to black, brown Description: Besides being a major component of the pegmatite matrix in general, where it is massive, it is abundant in miarolitic cavities as euhedral crystals. Some show phantoms or inclusions of schernikite fibers and elbaite and some are encrusted with cookeite blebs or show surface pit scars where cookeite was naturally removed. One 1.8-meter pocket contained nothing but jet-black smoky quartz crystals up to 14 cm in length. Etched crystals or oddly-shaped overgrowths on earlier fragments of quartz also known. Beautiful, doubly terminated crystals are often penetrated by elbaite. "One of these crystals, very flat and with several tourmalines inclosed, was worn as a watch-charm by the son of M. P. Gillette. This crystal in its natural state has as fine a polish as though it had just come from the lapidary's hand." (Davis, 1901). References: |
| ⓘ Scheelite Formula: Ca(WO4) Fluorescence: blue-white Description: minute grains in quartz-tourmaline matrix; an incomplete one inch white crystal at the Gillette Quarry in Haddam Neck; small masses are scattered through the vesuvianite and quartz in the calc-silicate vein in the wall rock. |
| ⓘ Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) Habit: elongated trigonal prisms, typically poorly terminated Colour: black Description: Common accessory mineral frozen in pegmatite matrix, can be near but is not in miarolitic pockets, though it can grade into elbaite. |
| ⓘ Sillimanite ? Formula: Al2(SiO4)O Description: Included in a list of minerals with no supporting documentation. Has been found in area metamorphic rocks. |
| ⓘ Spessartine ? Formula: Mn2+3Al2(SiO4)3 Description: Included in a list of minerals with no supporting documentation. Most garnet in this pegmatite district is almandine, but spessartines are more likely in the highly chemically evolved pegmatites like this one. Crystals from here are typically red and <1 cm. |
| ⓘ Sphalerite Formula: ZnS Description: "observed with limonite and black tourmaline" Schooner (1958) |
| ⓘ Spodumene ? Formula: LiAlSi2O6 Description: Given the absence of common spodumene crystals, the casually reported gemstones of the pink variety kunzite could simply have been morganite beryl; and a waxy butterscotch colored purported spodumene crystal measuring 1.5 x 2.0 x 5.0 cm altered to “pinite” is likely a muscovite pseudomorph after topaz, which are documented and in this size range. References: |
| ⓘ 'Tantalite' ? Formula: (Mn,Fe)(Ta,Nb)2O6 Description: Januzzi (1976) merely stated: "Although tantalite has not been officially reported from western Connecticut, it undoubtedly occurs at some of the localities listed for columbite." Schooner (1959) included it in his list of minerals but gave no supporting information. References: |
| ⓘ Titanite Formula: CaTi(SiO4)O Description: "A few very lean examples" Schooner (1958), probably from the surrounding metamorphic rocks. |
| ✪ Topaz Formula: Al2(SiO4)(F,OH)2 Habit: equant or flattened with multiple terminal forms Colour: colorless to pale blue, orange (altered) Description: First found in the mid-1950s and so often unrecognized in earlier collections, topaz occurs rarely as equant, rhombic cross-section crystals up to 1 cm in the cavities or more commonly up to 5.6 cm embedded in quartz-albite-muscovite matrix. Greasy, orange-brown crystals are partially or wholly altered to muscovite and were earlier mistaken for "pinite" pseudomorphs after spodumene. References: |
| ✪ 'Tourmaline' Formula: AD3G6(T6O18)(BO3)3X3Z Habit: elongated, striated, trigonal prisms capped by pinacoids or rhombohedra Colour: black to green, rarely pink to colorless, with yellow, pink, pale green, blue terminations Description: See comments under elbaite and schorl. References: Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02 |
| ⓘ 'Tourmaline var. Achroite' References: |
| ⓘ Uraninite ? Formula: UO2 Description: Included in mineral lists but with no documentation. Plausible as it occurs in area pegmatites. |
| ⓘ Uranophane Formula: Ca(UO2)2(SiO3OH)2 · 5H2O Habit: acicular micros Colour: lemon-yellow Description: "rarely as small (to 1 mm) lemon-yellow acicular crystals" Scovil (1992) |
| ⓘ Vesuvianite Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 Habit: columnar aggregates of striated elongate crystals Colour: light brown Description: With other calc-silicate minerals in a vein in the gneissic wall rock. Found by Schooner in 1953 and 1954. Confirmed by an x-ray diffraction test made by Mary E. Mrose of the U. S. Geological Survey. The largest specimen was six inches in length and half as wide. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Graphite | 1.CB.05a | C |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Molybdenite ? | 2.EA.30 | MoS2 |
| ⓘ | Pyrite ? | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite var. Chlorophane | 3.AB.25 | CaF2 |
| ⓘ | 3.AB.25 | CaF2 | |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | 'Microlite Group' | 4.00. | A2-mTa2X6-wZ1-n |
| ⓘ | 'Pyrochlore Group' ? | 4.00. | A2Nb2(O,OH)6Z |
| ⓘ | Chrysoberyl ? | 4.BA.05 | BeAl2O4 |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Rose Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Smoky Quartz | 4.DA.05 | SiO2 |
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
| ⓘ | Pyrolusite ? | 4.DB.05 | Mn4+O2 |
| ⓘ | Columbite-(Fe) | 4.DB.35 | Fe2+Nb2O6 |
| ⓘ | Uraninite ? | 4.DL.05 | UO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| Group 9 - Silicates | |||
| ⓘ | Almandine | 9.AD.25 | Fe2+3Al2(SiO4)3 |
| ⓘ | Grossular ? | 9.AD.25 | Ca3Al2(SiO4)3 |
| ⓘ | Spessartine ? | 9.AD.25 | Mn2+3Al2(SiO4)3 |
| ⓘ | Sillimanite ? | 9.AF.05 | Al2(SiO4)O |
| ⓘ | Kyanite ? | 9.AF.15 | Al2(SiO4)O |
| ⓘ | Topaz | 9.AF.35 | Al2(SiO4)(F,OH)2 |
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Uranophane | 9.AK.15 | Ca(UO2)2(SiO3OH)2 · 5H2O |
| ⓘ | Vesuvianite | 9.BG.35 | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| ⓘ | Beryl var. Aquamarine | 9.CJ.05 | Be3Al2(Si6O18) |
| ⓘ | 9.CJ.05 | Be3Al2(Si6O18) | |
| ⓘ | var. Morganite | 9.CJ.05 | Be3Al2(Si6O18) |
| ⓘ | var. Goshenite | 9.CJ.05 | Be3Al2(Si6O18) |
| ⓘ | Elbaite | 9.CK.05 | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
| ⓘ | Spodumene ? | 9.DA.30 | LiAlSi2O6 |
| ⓘ | Actinolite | 9.DE.10 | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Schernikite (TL) | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | Annite | 9.EC.20 | KFe2+3(AlSi3O10)(OH)2 |
| ⓘ | Phlogopite ? | 9.EC.20 | KMg3(AlSi3O10)(OH)2 |
| ⓘ | Montmorillonite ? | 9.EC.40 | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| ⓘ | Cookeite | 9.EC.55 | (LiAl4◻)[AlSi3O10](OH)8 |
| ⓘ | Microcline var. Amazonite | 9.FA.30 | K(AlSi3O8) |
| ⓘ | 9.FA.30 | K(AlSi3O8) | |
| ⓘ | Orthoclase | 9.FA.30 | K(AlSi3O8) |
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| ⓘ | var. Oligoclase ? | 9.FA.35 | (Na,Ca)[Al(Si,Al)Si2O8] |
| ⓘ | var. Cleavelandite | 9.FA.35 | Na(AlSi3O8) |
| Unclassified | |||
| ⓘ | 'Tourmaline var. Achroite' | - | AD3G6(T6O18)(BO3)3X3Z |
| ⓘ | 'Lepidolite' | - | |
| ⓘ | 'Tantalite' ? | - | (Mn,Fe)(Ta,Nb)2O6 |
| ⓘ | 'Tourmaline' | - | AD3G6(T6O18)(BO3)3X3Z |
| ⓘ | 'Axinite Group' ? | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| H | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| H | ⓘ Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
| H | ⓘ Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Gypsum | CaSO4 · 2H2O |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| H | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| H | ⓘ Pyrochlore Group | A2Nb2(O,OH)6Z |
| H | ⓘ Muscovite var. Schernikite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
| H | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| H | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Li | Lithium | |
| Li | ⓘ Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
| Li | ⓘ Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| Li | ⓘ Spodumene | LiAlSi2O6 |
| Be | Beryllium | |
| Be | ⓘ Beryl | Be3Al2(Si6O18) |
| Be | ⓘ Chrysoberyl | BeAl2O4 |
| Be | ⓘ Beryl var. Morganite | Be3Al2(Si6O18) |
| Be | ⓘ Beryl var. Goshenite | Be3Al2(Si6O18) |
| B | Boron | |
| B | ⓘ Tourmaline var. Achroite | |
| B | ⓘ Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Graphite | C |
| O | Oxygen | |
| O | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Microcline var. Amazonite | K(AlSi3O8) |
| O | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| O | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| O | ⓘ Tourmaline var. Achroite | |
| O | ⓘ Beryl | Be3Al2(Si6O18) |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Cassiterite | SnO2 |
| O | ⓘ Chrysoberyl | BeAl2O4 |
| O | ⓘ Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
| O | ⓘ Diopside | CaMgSi2O6 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Columbite-(Fe) | Fe2+Nb2O6 |
| O | ⓘ Fluorapatite | Ca5(PO4)3F |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Grossular | Ca3Al2(SiO4)3 |
| O | ⓘ Gypsum | CaSO4 · 2H2O |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Kyanite | Al2(SiO4)O |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Microcline | K(AlSi3O8) |
| O | ⓘ Beryl var. Morganite | Be3Al2(Si6O18) |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| O | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| O | ⓘ Orthoclase | K(AlSi3O8) |
| O | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| O | ⓘ Pyrochlore Group | A2Nb2(O,OH)6Z |
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Quartz var. Rose Quartz | SiO2 |
| O | ⓘ Scheelite | Ca(WO4) |
| O | ⓘ Muscovite var. Schernikite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Sillimanite | Al2(SiO4)O |
| O | ⓘ Quartz var. Smoky Quartz | SiO2 |
| O | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| O | ⓘ Spodumene | LiAlSi2O6 |
| O | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
| O | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| O | ⓘ Uraninite | UO2 |
| O | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| O | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| O | ⓘ Beryl var. Goshenite | Be3Al2(Si6O18) |
| O | ⓘ Albite var. Cleavelandite | Na(AlSi3O8) |
| F | Fluorine | |
| F | ⓘ Fluorite var. Chlorophane | CaF2 |
| F | ⓘ Fluorapatite | Ca5(PO4)3F |
| F | ⓘ Fluorite | CaF2 |
| F | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| Na | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Na | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Na | ⓘ Albite var. Cleavelandite | Na(AlSi3O8) |
| Mg | Magnesium | |
| Mg | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Mg | ⓘ Diopside | CaMgSi2O6 |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Mg | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Mg | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Microcline var. Amazonite | K(AlSi3O8) |
| Al | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| Al | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Al | ⓘ Beryl | Be3Al2(Si6O18) |
| Al | ⓘ Chrysoberyl | BeAl2O4 |
| Al | ⓘ Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
| Al | ⓘ Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Al | ⓘ Kyanite | Al2(SiO4)O |
| Al | ⓘ Microcline | K(AlSi3O8) |
| Al | ⓘ Beryl var. Morganite | Be3Al2(Si6O18) |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Al | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Al | ⓘ Orthoclase | K(AlSi3O8) |
| Al | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Schernikite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Sillimanite | Al2(SiO4)O |
| Al | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| Al | ⓘ Spodumene | LiAlSi2O6 |
| Al | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
| Al | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | ⓘ Beryl var. Goshenite | Be3Al2(Si6O18) |
| Al | ⓘ Albite var. Cleavelandite | Na(AlSi3O8) |
| Si | Silicon | |
| Si | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Microcline var. Amazonite | K(AlSi3O8) |
| Si | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| Si | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Si | ⓘ Beryl | Be3Al2(Si6O18) |
| Si | ⓘ Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
| Si | ⓘ Diopside | CaMgSi2O6 |
| Si | ⓘ Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Si | ⓘ Kyanite | Al2(SiO4)O |
| Si | ⓘ Microcline | K(AlSi3O8) |
| Si | ⓘ Beryl var. Morganite | Be3Al2(Si6O18) |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Si | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Si | ⓘ Orthoclase | K(AlSi3O8) |
| Si | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Quartz var. Rose Quartz | SiO2 |
| Si | ⓘ Muscovite var. Schernikite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Sillimanite | Al2(SiO4)O |
| Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
| Si | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| Si | ⓘ Spodumene | LiAlSi2O6 |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| Si | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
| Si | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| Si | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Si | ⓘ Beryl var. Goshenite | Be3Al2(Si6O18) |
| Si | ⓘ Albite var. Cleavelandite | Na(AlSi3O8) |
| P | Phosphorus | |
| P | ⓘ Fluorapatite | Ca5(PO4)3F |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Gypsum | CaSO4 · 2H2O |
| S | ⓘ Molybdenite | MoS2 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| S | ⓘ Sphalerite | ZnS |
| K | Potassium | |
| K | ⓘ Microcline var. Amazonite | K(AlSi3O8) |
| K | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| K | ⓘ Microcline | K(AlSi3O8) |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Orthoclase | K(AlSi3O8) |
| K | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Schernikite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Fluorite var. Chlorophane | CaF2 |
| Ca | ⓘ Diopside | CaMgSi2O6 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Fluorapatite | Ca5(PO4)3F |
| Ca | ⓘ Fluorite | CaF2 |
| Ca | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Ca | ⓘ Gypsum | CaSO4 · 2H2O |
| Ca | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Ca | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Ca | ⓘ Scheelite | Ca(WO4) |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ca | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| Ca | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Ti | Titanium | |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Mn | Manganese | |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Mn | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| Mn | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| Fe | Iron | |
| Fe | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Fe | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| Fe | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Columbite-(Fe) | Fe2+Nb2O6 |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Fe | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| Fe | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Nb | Niobium | |
| Nb | ⓘ Columbite-(Fe) | Fe2+Nb2O6 |
| Nb | ⓘ Pyrochlore Group | A2Nb2(O,OH)6Z |
| Nb | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| Ta | Tantalum | |
| Ta | ⓘ Microlite Group | A2-mTa2X6-wZ1-n |
| Ta | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
| U | Uranium | |
| U | ⓘ Uraninite | UO2 |
| U | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ganderia DomainDomain
- GranderiaPassive Margin
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02
Bowman, H. L. (1903) Ueber das Mineralvorkommen zu Haddam Neck in Connecticut (Ver. St.). Zeitschrift für Kristallographie, 37 (1). 97 doi:10.1524/zkri.1903.37.1.97
Bastin, Edson S. (1910) Economic geology of the feldspar deposits of the United States. Bulletin 420. US Geological Survey doi:10.3133/b420
Foye, Wilbur G. (1922) Mineral localities in the vicinity of Middletown, Connecticut. American Mineralogist, 7 (1) 4-12
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
Stugard, Frederick Jr. (1958) Pegmatites of the Middletown area, Connecticut. Bulletin 1042q. US Geological Survey doi:10.3133/b1042q
Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA