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
Kylylahti Mine, Polvijärvi, North Karelia, Finland


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 Kylylahti Mine, Polvijärvi, North Karelia, Finland
Data Identifiers
Mindat Occurrence Record ID:557644
Long-form Identifier:1:3:557644:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.8km (9.8 miles) ⓘVuonos Mine, Outokumpu, North Karelia, Finland
55.7km (34.6 miles) ⓘHammaslahti deposit (Lähdekorpi deposit), Joensuu, North Karelia, Finland
83.2km (51.7 miles) ⓘSiilinjärvi Carbonatite Intrusion, Siilinjärvi, North Savo, Finland
86.1km (53.5 miles) ⓘSiilinjärvi Mine, Siilinjärvi, North Savo, Finland
94.1km (58.5 miles) ⓘKivisuo prospect, Ilomantsi, North Karelia, Finland
97.3km (60.5 miles) ⓘKorpilampi, Ilomantsi, North Karelia, Finland
98.5km (61.2 miles) ⓘKuittila prospect, Ilomantsi, North Karelia, Finland
99.3km (61.7 miles) ⓘPampalo Au deposit, Ilomantsi, North Karelia, Finland
References
Peltonen, P., Kontinen, A., Huhma, H., Kuronen, U. (2008) Outokumpu revisited: New mineral deposit model for the mantle peridotite-associated Cu–Co–Zn–Ni–Ag–Au sulphide deposits. Ore Geology Reviews, 33 (3-4) 559-617 doi:10.1016/j.oregeorev.2007.07.002
 
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