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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Cassiterite from
Anderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA


06476510017368762951895.jpg
Cassiterite, etc.

Anderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
06476510017368762951895.jpg
Cassiterite, etc.

Anderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
08803260017368762967722.jpg
Cassiterite, etc.

Anderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
Locality type:Mine
Classification
Species:Cassiterite
Formula:SnO2
Formation:Primary
Comments:"lepidolite occasionally contains little black cassiterite crystals; Anthony J. Albini has some sharp crystals, perhaps 3/16 of an inch, in cleavelandite. The Eugene Smith collection has a beautiful crystallized specimen, labelled 'microlite'." (Schooner, circa 1990)
Habit:pseudo-octahedral
Colour:dark - nearly black
Abundance at site:Very Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite1
- var Cleavelandite1
Data
Mineral Data:Click here to view Cassiterite data
Locality Data:Click here to view Anderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:38370
Long-form Identifier:1:3:38370:9
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
2.8km (1.7 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
8.2km (5.1 miles) ⓘRiverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
10.2km (6.4 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
12.9km (8.0 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
15.2km (9.5 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
15.3km (9.5 miles) ⓘBrack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford County, Connecticut, USA
62.3km (38.7 miles) ⓘLane's Mine (Lane's Lead and Silver Mine; Elm Street), Monroe, Fairfield County, Connecticut, USA
81.5km (50.6 miles) ⓘBlandford mica mines, Blandford, Hampden County, Massachusetts, USA
References
Schooner, Richard. (circa 1990), Untitled manuscript on central Connecticut mineralogy.
Weber, Marcelle H., Sullivan, Earle C. (1995) Connecticut Mineral Locality Index. Rocks & Minerals, 70 (6) 396-409 doi:10.1080/00357529.1995.11761569p.403
 
and/or  
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