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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Annite from
Pelton's Quarry, Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Annite
Formula:KFe32+(AlSi3O10)(OH)2
Comments:fka biotite
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Annite data
Locality Data:Click here to view Pelton's Quarry, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:720499
Long-form Identifier:1:3:720499:9
GUID (UUID V4):0
Nearest other occurrences of Annite
0.5km (0.3 miles) ⓘPenfield Quarry (Oak Leaf Quarry), Portland, Middlesex County, Connecticut, USA
1.6km (1.0 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
1.6km (1.0 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
2.0km (1.2 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
2.5km (1.5 miles) ⓘGotta-Walden Prospect, Portland, Middlesex County, Connecticut, USA
2.5km (1.6 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
2.7km (1.7 miles) ⓘCase Quarry No. 1, Case Quarries, Portland, Middlesex County, Connecticut, USA
2.7km (1.7 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
3.0km (1.9 miles) ⓘState Forest Quarry No. 1, East Hampton, Middlesex County, Connecticut, USA
3.2km (2.0 miles) ⓘNathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
References
Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA.
 
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