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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Sphalerite from
Hale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Sphalerite
Formula:ZnS
Comments:Zodac (1941) was referring to what he called the Grandfather Andrews Quarry and is now called the Andrews Quarry, so this report is erroneous.
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Sphalerite data
Locality Data:Click here to view Hale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:96330
Long-form Identifier:1:3:96330:1
GUID (UUID V4):0
Nearest other occurrences of Sphalerite
0.3km (0.2 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
4.1km (2.5 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.1km (2.6 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
5.9km (3.7 miles) ⓘKnob Hill Quarry, Glastonbury, Hartford County, Connecticut, USA
7.0km (4.3 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
7.1km (4.4 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
7.5km (4.6 miles) ⓘPaxton Way, Glastonbury, Hartford County, Connecticut, USA
7.9km (4.9 miles) ⓘMiddletown lead mines (Middletown Mine), Middletown, Middlesex County, Connecticut, USA
8.1km (5.0 miles) ⓘState Farm Quarry (Road Metal Quarry), Middletown, Middlesex County, Connecticut, USA
8.4km (5.2 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
References
Zodac, Peter (1941): The Andrews Quarry Near Portland, Conn. Rocks and Minerals: 16(5): 164-167.pp.164-165
 
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