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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Perthite from
Riverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Feldspar Group var: Perthite
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Perthite data
Locality Data:Click here to view Riverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:654666
Long-form Identifier:1:3:654666:3
GUID (UUID V4):0
Nearest other occurrences of Perthite
6.7km (4.2 miles) ⓘState Forest Quarry No. 1, East Hampton, Middlesex County, Connecticut, USA
8.3km (5.2 miles) ⓘAnderson No. 2 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
8.4km (5.2 miles) ⓘBailey prospect, East Hampton, Middlesex County, Connecticut, USA
9.6km (6.0 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
17.7km (11.0 miles) ⓘBlumenthal prospect, Glastonbury, Hartford County, Connecticut, USA
43.3km (26.9 miles) ⓘKnapp Prospect, Canton, Hartford County, Connecticut, USA
49.1km (30.5 miles) ⓘCurtis Quarry, Southford, Southbury, New Haven County, Connecticut, USA
87.9km (54.6 miles) ⓘWest Kingston, South Kingstown, Washington County, Rhode Island, USA
94.4km (58.7 miles) ⓘSmithfield beryl prospect, Smithfield, Providence County, Rhode Island, USA
References
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
 
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