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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Uraninite from
Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA


08283740017368866687756.jpg
Uraninite, etc.

Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
02775490017368866708943.jpg
Uraninite, etc.

Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
08283740017368866687756.jpg
Uraninite, etc.

Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
02775490017368866708943.jpg
Uraninite, etc.

Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
08283740017368866687756.jpg
Uraninite, etc.

Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
02775490017368866708943.jpg
Uraninite, etc.

Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Uraninite
Formula:UO2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Fluorapatite3
Meta-autunite3
Quartz3
Microcline2
Almandine2
Data
Mineral Data:Click here to view Uraninite data
Locality Data:Click here to view Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:657261
Long-form Identifier:1:3:657261:7
GUID (UUID V4):0
Nearest other occurrences of Uraninite
0.4km (0.2 miles) ⓘBordonaro Quarry, Portland, Middlesex County, Connecticut, USA
1.2km (0.7 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
1.5km (0.9 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
1.5km (0.9 miles) ⓘCase Quarry No. 2, Case Quarries, Portland, Middlesex County, Connecticut, USA
1.6km (1.0 miles) ⓘCase Quarry No. 3, Case Quarries, Portland, Middlesex County, Connecticut, USA
2.3km (1.4 miles) ⓘHowe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
2.4km (1.5 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
2.5km (1.6 miles) ⓘPelton's Quarry, Portland, Middlesex County, Connecticut, USA
2.9km (1.8 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
References
Rocks & Minerals (1970) 45:595-600
 
and/or  
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