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
Pikes Peak, El Paso County, Colorado, USA


Locality type:Peak
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 Pikes Peak, El Paso County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:136642
Long-form Identifier:1:3:136642:6
GUID (UUID V4):0
Localities for Biotite in this Region
Pikes Peak batholith miarolitic cavities, Pikes Peak, El Paso County, Colorado, USA
Sentinel rock (Specimen rock), Pikes Peak, El Paso County, Colorado, USA
Nearest other occurrences of Biotite
7.6km (4.8 miles) ⓘCameron Cone, Crystal Park, El Paso County, Colorado, USA
9.6km (6.0 miles) ⓘCrystal Park area, Crystal Park, El Paso County, Colorado, USA
11.5km (7.1 miles) ⓘSentinel rock (Specimen rock), Pikes Peak, El Paso County, Colorado, USA
11.5km (7.1 miles) ⓘSpecimen Rock, El Paso County, Colorado, USA
12.6km (7.8 miles) ⓘMount Rosa, El Paso County, Colorado, USA
13.4km (8.3 miles) ⓘStove Mountain (Cookstove Mountain), El Paso County, Colorado, USA
15.1km (9.4 miles) ⓘGold Sovereign Mine (Jackson Shaft), Cripple Creek Mining District, Teller County, Colorado, USA
16.6km (10.3 miles) ⓘOphelia Tunnel (Gold Exploration; Moffat Tunnel), Cripple Creek Mining District, Teller County, Colorado, USA
18.0km (11.2 miles) ⓘPopes Bluff, Colorado Springs, El Paso County, Colorado, USA
18.4km (11.4 miles) ⓘBlack Cloud Mine, Teller County, Colorado, USA
References
Muntyan, Barbara, Muntyan, John (1985) Minerals of the Pikes Peak Granite [Colorado]. The Mineralogical Record, 16 (3) 217-230pp.217-230
 
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