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


Locality type:Quarry
Classification
Species:Spessartine
Formula:Mn32+Al2(SiO4)3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Spessartine data
Locality Data:Click here to view Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:657184
Long-form Identifier:1:3:657184:9
GUID (UUID V4):0
Nearest other occurrences of Spessartine
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
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
2.8km (1.7 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
3.0km (1.8 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
3.8km (2.3 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.1km (2.5 miles) ⓘChamberlain Lane, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
5.2km (3.3 miles) ⓘState Forest Quarry No. 1, East Hampton, Middlesex County, Connecticut, USA
5.4km (3.4 miles) ⓘNathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
References
Rocks & Minerals (1970) 45:443-449
 
and/or  
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