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
Badger Mine (Badger tunnel; Getrude), Ophir Mining District (Iron Springs Mining District), San Miguel County, Colorado, USA


Locality type:Mine
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 Badger Mine (Badger tunnel; Getrude), Ophir Mining District (Iron Springs Mining District), San Miguel County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:432629
Long-form Identifier:1:3:432629:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
23.3km (14.5 miles) ⓘSilver Creek Molybdenum deposit, Silver Creek, Rico Mining District (Pioneer Mining District), Rico Mountains, Dolores County, Colorado, USA
23.7km (14.7 miles) ⓘPotato Peak, San Juan County, Colorado, USA
39.9km (24.8 miles) ⓘPride of America Mine, Galena Mining District (Henson Creek Mining District), Hinsdale County, Colorado, USA
44.7km (27.8 miles) ⓘBakers Bridge, Durango Area, La Plata County, Colorado, USA
55.1km (34.2 miles) ⓘCopper Hill Mine, La Plata, La Plata Mining District (California Mining District), La Plata County, Colorado, USA
72.9km (45.3 miles) ⓘBlack Canyon Beryl Prospect, Curecanti Needle Area, Gunnison County, Colorado, USA
76.2km (47.3 miles) ⓘLast Chance Mine (Unpatented Claim: Peifer; Peifer Quarry), Curecanti Needle Area, Gunnison County, Colorado, USA
78.4km (48.7 miles) ⓘThorium Prospects (MRDS - 10014575), White Earth Mining District (Powderhorn Mining District), Gunnison County, Colorado, USA
79.1km (49.1 miles) ⓘCreede Formation, Creede Mining District, Mineral County, Colorado, USA
79.8km (49.6 miles) ⓘGoat Hill No. 1 occurrence, Montrose County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
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