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
North Street mall, Danbury, Fairfield County, Connecticut, USA


Locality type:Construction Site
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Comments:Part of the assemblage quartz, feldspar, pyroxene, amphibole, sphene, zircon and biotite.
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:Common
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view North Street mall, Danbury, Fairfield County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:805102
Long-form Identifier:1:3:805102:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.7km (2.3 miles) ⓘWestern Connecticut State University, Danbury, Fairfield County, Connecticut, USA
4.1km (2.5 miles) ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
4.3km (2.7 miles) ⓘOld Quarry Nature Center, Danbury, Fairfield County, Connecticut, USA
6.7km (4.2 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
8.7km (5.4 miles) ⓘU. S. Route 7 Expressway (Brookfield Bypass), Brookfield, Fairfield County, Connecticut, USA
13.6km (8.5 miles) ⓘInterstate 84 road cuts, Town of Southeast, Putnam County, New York, USA
14.0km (8.7 miles) ⓘRedding Glen, Redding, Fairfield County, Connecticut, USA
15.5km (9.6 miles) ⓘTilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
16.6km (10.3 miles) ⓘGreen's Farm locality (Roxbury garnet mine; Roxbury Falls garnet mine; Garnet Hill), Roxbury, Litchfield County, Connecticut, USA
17.6km (10.9 miles) ⓘMc Collum Mine, North Salem, Westchester County, New York, 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.pp.192-201
 
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