Description: "The first discovery of this rare mineral in the United States was by Dr. Jackson, in the limestone at Bolton, Mass., accompanying petalite. It has since been found by Prof. Hitchcock at Athol, Mass., occurring in gneiss. The prisms are rarely two inches long and a quarter of an inch thick, truncated upon the lateral edges, so as in fact to become six-sided prisms; but they present no distinct terminations. The fracture is resinous, and all the external characters of the mineral correspond with Allanite from Greenland." - William Phillips, Robert Allan, Francis Alger (1844). An Elementary Treatise on Mineralogy, p.418.

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ 'Amphibole Supergroup'

Formula: AB₂C₅(T₈O₂₂)W₂

Locality: Pine Hill, Bolton, Worcester County, Massachusetts, USA

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ Andalusite

Formula: Al₂(SiO₄)O

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ Antigorite

Formula: Mg₃(Si₂O₅)(OH)₄

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃A

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ Arsenopyrite

Formula: FeAsS

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Silliman, Benjamin (1849). Descriptions and Analysis of Several American Minerals (Philosophical Magazine and Journal of Science 35:450-465.)

ⓘ Beryl

Formula: Be₃Al₂(Si₆O₁₈)

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

Localities:

Pine Hill, Bolton, Worcester County, Massachusetts, USA
Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

ⓘ Calcite

Formula: CaCO₃

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Chalcopyrite

Formula: CuFeS₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Chondrodite

Formula: Mg₅(SiO₄)₂F₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Clinohumite

Formula: Mg₉(SiO₄)₄F₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Harvard Mineralogical Museum no.130909.

ⓘ Diopside

Formula: CaMgSi₂O₆

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ Dolomite

Formula: CaMg(CO₃)₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

Localities:

Bolton, Worcester County, Massachusetts, USA
Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

ⓘ Fluorite ?

Formula: CaF₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ ~~Fluorite var. Yttrocerite~~

Formula: (Ca,Y,Ce)F_2+x

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA - erroneously reported

Description: Properly identified yttrocerite contains some yttria. However, a common practice in the nineteenth century was to call all dark purple fluorite by the name "yttrocerite". No chemical analyses of this mineral are known from Bolton and it is uncertain if it were found in the marble or in pegmatite float boulders and the name seems to be incorrectly used.

References:

Hitchcock, Edward (1835) Report on the geology, mineralogy, botany, and zoology of Massachusetts (2nd ed.) J.S. and C. Adams, Amherst, MD. pp.308-311

ⓘ Forsterite

Formula: Mg₂(SiO₄)

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Description: Boltonite was once thought to be a new mineral but it was later proven to be forsterite. Hitchock (1835), p.309: "At Bolton, also, a new mineral has been discovered, which Dr. Thomson has denominated from its chemical composition, Bilsilicate of Magnesia; and Mr. Shephard, with reference to its locality, calls it Boltonite. It occurs in foliated masses in the limestone."

References:

Yale Peabody Museum #580, #677, #3263

Hitchock (1835), p.309

ⓘ 'Gadolinite' ?

Localities:

Bolton Pegmatite float boulder occurrence, Bolton, Worcester County, Massachusetts, USA ? (more information)
~~Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA~~ (more information)

Description: Gadolinite is a mineral characteristic of rare-earth rich granite pegmatites or alpine veins. No data have been published on the identification and efforts to locate any example, verified or not have been fruitless. The mineral may have been found in erratic pegmatite boulders, but certainly not in the marble.

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

Locality: Pine Hill, Bolton, Worcester County, Massachusetts, USA

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ Graphite

Formula: C

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ Grossular ?

Formula: Ca₃Al₂(SiO₄)₃

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ 'Lepidolite' ?

Locality: Bolton Pegmatite float boulder occurrence, Bolton, Worcester County, Massachusetts, USA

ⓘ Magnesio-hornblende

Formula: ◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Habit: crystals

Colour: brown

References:

Cristofono, Peter (n.d.) Personal communication.

ⓘ Magnesite

Formula: MgCO₃

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Habit: Dana (1854), p. 441: "indistinctly fibrous masses, traversing the limestone."

References:

Dana, James D. (1854) A System of Mineralogy (4th ed.). p.1-849.pages 441, 480

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Meionite

Formula: Ca₄Al₆Si₆O₂₄CO₃

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Sherriff, B. L.; Sokolova, E. V.; Kabalov, Y. K.; Jenkins, D. M.; Kunath-Fandrei, G.; Goetz, S.; Jager, C.; Schneider, J. (2000) Meionite: Rietveld structure-refinement 29Si MAS and 27Al SATRAS NMR spectroscopy, and comments on the marialite-meionite series. The Canadian Mineralogist, 38 (5). 1201-1213 doi:10.2113/gscanmin.38.5.1201

Anthony, John W., Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - Eds. (2016) Handbook of Mineralogy. https://www.handbookofmineralogy.org/

ⓘ Meionite var. Nuttallite

Formula: Ca₄Al₆Si₆O₂₄CO₃

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Brooke, H. J. (1824): On the Nuttallite, a new Mineral from Bolton, in Massachusetts, Annals of Philosophy: 7: 366. [Nuttallite was named for T. Nuttall, who brought the mineral to England.]

ⓘ Microcline

Formula: K(AlSi₃O₈)

Localities:

ⓘ Molybdenite

Formula: MoS₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Localities:

ⓘ Opal

Formula: SiO₂ · nH₂O

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Habit: coatings

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ Opal var. Opal-AN

Formula: SiO₂ · nH₂O

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Habit: coatings

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ Pargasite

Formula: NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ Petalite

Formula: LiAl(Si₄O₁₀)

Localities:

Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA
Bolton Pegmatite float boulder occurrence, Bolton, Worcester County, Massachusetts, USA ? (more information)

Fluorescence: blue

Description: Palache (1923) says that it is probable that the petalite reported by Dana was found in an erratic boulder, and not the quarry proper. Petalite was commonly reported in New England in the nineteenth century and into the twentieth. An unverified petalite specimen from this locality (YPM 6887) is in the Yale Peabody Museum. This locality is an unbelievable report from a marble! See Bolton Pegmatite Float Boulder Occurrence. Records for Yale Peabody Museum specimen YPM MIN026887 only specify Bolton, Mass. for the locality; no reference is made to "Bolton Limestone quarry." The specimen is labeled as an A. E. Foote specimen, and was donated to the museum in 1957.

ⓘ Phlogopite

Formula: KMg₃(AlSi₃O₁₀)(OH)₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Pyrite

Formula: FeS₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Pyrrhotite

Formula: Fe_1-xS

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Quartz

Formula: SiO₂

Localities:

Bolton Pegmatite float boulder occurrence, Bolton, Worcester County, Massachusetts, USA
Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

ⓘ Rutile

Formula: TiO₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Habit: small prisms

Description: Dana, J. D. (1839): " The scapolite...contains, also, exceedingly minute zircons, scarcely 1/40 inch long, and also very small prisms of rutile."

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ 'Scapolite'

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Fluorescence: Magenta-pink-fluorescing

Description: "C.T. Jackson found 1.58 pr. cnt. lithia and 2 pr. cnt. oxides of cerium and lanthanum in the pink skapolite [sic], from Bolton, Massachusetts; but C. Hartshorne found neiher of these constituents in that mineral from the same locality." -- Booth, James C. (1862). The Enclopedia of Chemistry, Practical and Theoretical, 2nd ed.

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ 'Scapolite var. Wernerite'

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Fluorescence: pink

Description: A "pink cut stone, one polished specimen" listed in Kunz (1889).

References:

Kunz, G. F. (1889). A Catalogue of a Collection of Precious and Ornamental Stones of North America Exhibited at the Paris Exhibtion, 1889 (Tiffany & Co., New York)p.26.

ⓘ Schorl

Formula: NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

References:

Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc.

ⓘ 'Serpentine Subgroup'

Formula: D₃[Si₂O₅](OH)₄

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

ⓘ Sillimanite

Formula: Al₂(SiO₄)O

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

ⓘ Spinel

Formula: MgAl₂O₄

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ Talc

Formula: Mg₃Si₄O₁₀(OH)₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Fluorescence: yellowish-fluorescing talc

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ Titanite

Formula: CaTi(SiO₄)O

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ 'Tourmaline'

Formula: AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

ⓘ Tremolite

Formula: ◻Ca₂Mg₅(Si₈O₂₂)(OH)₂

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

References:

Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island. Bulletin 597. US Geological Survey doi:10.3133/b597

ⓘ Vermiculite

Formula: Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Habit: micaceous

Colour: gray

Description: Originally and informally introduced as a new mineral name later identified as vermiculite-related phyllosilicate. See Clark (1993), Hey's Mineral Index, third edition, p. 92.

References:

Dake, H. C., 1941, [Brodrickite], The Mineralogist, v. 9, p. 443.

ⓘ Zircon

Formula: Zr(SiO₄)

Locality: Bolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA

Habit: Dana, J. D. (1839): The zircons are square prisms, having the lateral edges truncated, and pyramidally terminated at each extremity..."

Description: Dana, J. D. (1839): " The scapolite...contains, also, exceedingly minute zircons, scarcely 1/40 inch long, and also very small prisms of rutile."

References:

Palache, C., Pinger, A. W. (1923) The scapolite deposit of Bolton, Massachusetts. American Mineralogist, 8 (9). 153-157

Gallery:

◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂ⓘ Actinolite

Actinolite, etc.

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Actinolite, etc.

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Actinolite, etc.

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Actinolite, etc.

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Actinolite, etc.

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Actinolite, etc.

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

TiO₂ⓘ Rutile

Rutile

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Rutile

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Rutile

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

CaTi(SiO₄)Oⓘ Titanite

Titanite

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Titanite

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

Titanite

Bolton Lime Quarries, Bolton, Worcester County, Massachusetts, USA

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Graphite	1.CB.05a	C
Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
ⓘ	Molybdenite	2.EA.30	MoS₂
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
Group 3 - Halides
ⓘ	Fluorite ?	3.AB.25	CaF₂
ⓘ	var. Yttrocerite ?	3.AB.25	(Ca,Y,Ce)F_2+x
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Spinel	4.BB.05	MgAl₂O₄
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Opal var. Opal-AN	4.DA.10	SiO₂ · nH₂O
ⓘ		4.DA.10	SiO₂ · nH₂O
ⓘ	Rutile	4.DB.05	TiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Magnesite	5.AB.05	MgCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Forsterite	9.AC.05	Mg₂(SiO₄)
ⓘ	Grossular ?	9.AD.25	Ca₃Al₂(SiO₄)₃
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Sillimanite	9.AF.05	Al₂(SiO₄)O
ⓘ	Andalusite	9.AF.10	Al₂(SiO₄)O
ⓘ	Chondrodite	9.AF.45	Mg₅(SiO₄)₂F₂
ⓘ	Clinohumite	9.AF.55	Mg₉(SiO₄)₄F₂
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Beryl	9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ	Schorl	9.CK.05	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Actinolite	9.DE.10	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
ⓘ	Magnesio-hornblende	9.DE.10	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
ⓘ	Tremolite	9.DE.10	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
ⓘ	Pargasite	9.DE.15	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
ⓘ	Talc	9.EC.05	Mg₃Si₄O₁₀(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Phlogopite	9.EC.20	KMg₃(AlSi₃O₁₀)(OH)₂
ⓘ	Vermiculite	9.EC.50	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
ⓘ	Antigorite	9.ED.15	Mg₃(Si₂O₅)(OH)₄
ⓘ	Petalite	9.EF.05	LiAl(Si₄O₁₀)
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Andesine	9.FA.35	(Na,Ca)[Al(Si,Al)Si₂O₈]
ⓘ	Meionite	9.FB.15	Ca₄Al₆Si₆O₂₄CO₃
ⓘ	var. Nuttallite	9.FB.15	Ca₄Al₆Si₆O₂₄CO₃
Unclassified
ⓘ	'Amphibole Supergroup'	-	AB₂C₅(T₈O₂₂)W₂
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Lepidolite' ?	-
ⓘ	'Tourmaline'	-	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
ⓘ	'Scapolite var. Wernerite'	-
ⓘ	''	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Gadolinite' ?	-
ⓘ	'Serpentine Subgroup'	-	D₃[Si₂O₅](OH)₄
ⓘ	'Apatite'	-	Ca₅(PO₄)₃A
ⓘ	'Allanite Group'	-	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
H	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
H	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Opal	SiO₂ · nH₂O
H	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
H	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
H	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
H	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
H	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
H	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
H	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
H	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
Li	Lithium
Li	ⓘ Petalite	LiAl(Si₄O₁₀)
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
B	Boron
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
C	ⓘ Magnesite	MgCO₃
C	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
C	ⓘ Scapolite var. Wernerite
C	ⓘ Meionite var. Nuttallite	Ca₄Al₆Si₆O₂₄CO₃
O	Oxygen
O	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Amphibole Supergroup	AB₂C₅(T₈O₂₂)W₂
O	ⓘ Andalusite	Al₂(SiO₄)O
O	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
O	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Calcite	CaCO₃
O	ⓘ Chondrodite	Mg₅(SiO₄)₂F₂
O	ⓘ Clinohumite	Mg₉(SiO₄)₄F₂
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Forsterite	Mg₂(SiO₄)
O	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
O	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
O	ⓘ Magnesite	MgCO₃
O	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Opal	SiO₂ · nH₂O
O	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
O	ⓘ Petalite	LiAl(Si₄O₁₀)
O	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Rutile	TiO₂
O	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Sillimanite	Al₂(SiO₄)O
O	ⓘ Spinel	MgAl₂O₄
O	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Tourmaline	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
O	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
O	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
O	ⓘ Scapolite var. Wernerite
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
O	ⓘ Meionite var. Nuttallite	Ca₄Al₆Si₆O₂₄CO₃
O	ⓘ Apatite	Ca₅(PO₄)₃A
O	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Chondrodite	Mg₅(SiO₄)₂F₂
F	ⓘ Clinohumite	Mg₉(SiO₄)₄F₂
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
F	ⓘ Fluorite	CaF₂
F	ⓘ Fluorite var. Yttrocerite	(Ca,Y,Ce)F_2+x
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Na	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Na	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Na	ⓘ Scapolite var. Wernerite
Mg	Magnesium
Mg	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Mg	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Chondrodite	Mg₅(SiO₄)₂F₂
Mg	ⓘ Clinohumite	Mg₉(SiO₄)₄F₂
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Mg	ⓘ Forsterite	Mg₂(SiO₄)
Mg	ⓘ Magnesite	MgCO₃
Mg	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Mg	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Mg	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Mg	ⓘ Spinel	MgAl₂O₄
Mg	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Mg	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Mg	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Andalusite	Al₂(SiO₄)O
Al	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Al	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Al	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Al	ⓘ Petalite	LiAl(Si₄O₁₀)
Al	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Al	ⓘ Sillimanite	Al₂(SiO₄)O
Al	ⓘ Spinel	MgAl₂O₄
Al	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Al	ⓘ Scapolite var. Wernerite
Al	ⓘ Meionite var. Nuttallite	Ca₄Al₆Si₆O₂₄CO₃
Si	Silicon
Si	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Andalusite	Al₂(SiO₄)O
Si	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Si	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Chondrodite	Mg₅(SiO₄)₂F₂
Si	ⓘ Clinohumite	Mg₉(SiO₄)₄F₂
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Forsterite	Mg₂(SiO₄)
Si	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Si	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
Si	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Si	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Opal	SiO₂ · nH₂O
Si	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Si	ⓘ Petalite	LiAl(Si₄O₁₀)
Si	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Sillimanite	Al₂(SiO₄)O
Si	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Si	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Si	ⓘ Scapolite var. Wernerite
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
Si	ⓘ Meionite var. Nuttallite	Ca₄Al₆Si₆O₂₄CO₃
Si	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Apatite	Ca₅(PO₄)₃A
S	Sulfur
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Molybdenite	MoS₂
S	ⓘ Pyrite	FeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
Cl	Chlorine
Cl	ⓘ Scapolite var. Wernerite
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Ca	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Ca	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Ca	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
Ca	ⓘ Pargasite	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Ca	ⓘ Scapolite var. Wernerite
Ca	ⓘ Fluorite var. Yttrocerite	(Ca,Y,Ce)F_2+x
Ca	ⓘ Meionite var. Nuttallite	Ca₄Al₆Si₆O₂₄CO₃
Ca	ⓘ Apatite	Ca₅(PO₄)₃A
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Rutile	TiO₂
Ti	ⓘ Titanite	CaTi(SiO₄)O
Fe	Iron
Fe	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Fe	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Fe	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
Y	Yttrium
Y	ⓘ Fluorite var. Yttrocerite	(Ca,Y,Ce)F_2+x
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Mo	Molybdenum
Mo	ⓘ Molybdenite	MoS₂
Ce	Cerium
Ce	ⓘ Fluorite var. Yttrocerite	(Ca,Y,Ce)F_2+x

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Wikipedia:	https://en.wikipedia.org/wiki/Bolton,_Massachusetts
Wikidata ID:	Q2560271
GeoNames ID:	4930907

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Massachusetts
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Bolton, Worcester County, Massachusetts, USA i
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