Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Microlite Group from
Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA


09316940017367222625104.jpg
Microlite Group

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
03601890017272018425929.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
09459130017394991472160.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
05861570017388809799981.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
09316940017367222625104.jpg
Microlite Group

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
07798140017368540888205.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
04513870017394988892506.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
06013770017382060646754.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
06081650017367568402322.jpg
Microlite Group

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
03601890017272018425929.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
05575460017395016754923.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
00655400017388809806842.jpg
Microlite Group, etc.

Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
Locality type:Prospect
Classification
Species:'Microlite Group' (not an IMA approved species)
Formula:A2-mTa2X6-wZ1-n
Comments:Crystals up to "almost half an inch" (Schooner, 1958) associated with cleavelandite and very dark smoky quartz in the southern pegmatite.
Habit:octahedral with dodecahedral and cubic modifications
Colour:pale to dark brown to black, yellow-green
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite16
- var Cleavelandite4
Quartz10
- var Smoky Quartz1
Monazite Group3
Lepidolite2
Spessartine1
Data
Mineral Data:Click here to view Microlite Group data
Locality Data:Click here to view Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
Photo GalleryView Gallery (21 photos)
Data Identifiers
Mindat Occurrence Record ID:13755
Long-form Identifier:1:3:13755:3
GUID (UUID V4):0
Nearest other occurrences of Microlite Group
0.5km (0.3 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
0.7km (0.4 miles) ⓘSimpson prospect #1, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.0km (0.6 miles) ⓘHowe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.3km (0.8 miles) ⓘChamberlain Lane, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.7km (1.1 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
2.8km (1.7 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
5.7km (3.5 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
6.4km (4.0 miles) ⓘBrack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford County, Connecticut, USA
6.5km (4.0 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
9.6km (6.0 miles) ⓘRiverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
References
Schooner (1958)
Betts, John H. (1999) The Quarries and Minerals of the Dayton Road District, South Glastonbury, Connecticut. Rocks & Minerals, 74 (2) 110-121 doi:10.1080/00357529909602524
 
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