Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Biotite from
Curtis Quarry, Southford, Southbury, New Haven County, Connecticut, USA


Locality type:Quarry
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Curtis Quarry, Southford, Southbury, New Haven County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:733777
Long-form Identifier:1:3:733777:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
11.0km (6.8 miles) ⓘLittle Laurel Lime Park, Seymour, New Haven County, Connecticut, USA
11.1km (6.9 miles) ⓘArsenic and nickel mine (Nickel Mine Brook), Seymour, New Haven County, Connecticut, USA
12.1km (7.5 miles) ⓘNew England Materials quarry, Monroe, Fairfield County, Connecticut, USA
12.4km (7.7 miles) ⓘGreen's Farm locality (Roxbury garnet mine; Roxbury Falls garnet mine; Garnet Hill), Roxbury, Litchfield County, Connecticut, USA
12.6km (7.9 miles) ⓘNonnewaug River Industrial Park, Woodbury, Litchfield County, Connecticut, USA
17.0km (10.6 miles) ⓘRoute 73 quarry, Waterbury, New Haven County, Connecticut, USA
17.7km (11.0 miles) ⓘCorporate Drive, Long Hill, Trumbull, Fairfield County, Connecticut, USA
18.3km (11.4 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
18.4km (11.4 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
19.1km (11.9 miles) ⓘRockside Quarry, Mine Hill, Roxbury, Litchfield County, Connecticut, USA
References
Ryerson, Kathleen H. (1972) Rockhouns Guide to Connecticut
 
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