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
Maid of Erin Mine, Rainy Hollow District, Atlin Mining Division, British Columbia, Canada


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 Maid of Erin Mine, Rainy Hollow District, Atlin Mining Division, British Columbia, Canada
Data Identifiers
Mindat Occurrence Record ID:809418
Long-form Identifier:1:3:809418:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
64.8km (40.2 miles) ⓘWindy Craggy deposit, Atlin Mining Division, British Columbia, Canada
67.5km (42.0 miles) ⓘMargerie Glacier prospect (Margarie Glacier prospect; Porcupine prospect), Glacier Bay Mining District, Juneau Mining District, Alaska, USA
70.1km (43.6 miles) ⓘNunatak Prospect (Muir Inlet), Hoonah-Angoon Census Area, Alaska, USA
99.1km (61.6 miles) ⓘPorter Claim, Carbon Hill, Wheaton River District, Whitehorse mining district, Yukon, Canada
References
I.C.L. Webster, G.E. Ray and A.R. Pettipas (1992) An Investigation of Selected Mineralized Skarns in British Columbia. British Columbia Geological Survey Paper 1992I
 
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