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
Ørtfjell East Mine, Rana Mines, Dunderland Valley, Rana, Nordland, Norway


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 Ørtfjell East Mine, Rana Mines, Dunderland Valley, Rana, Nordland, Norway
Data Identifiers
Mindat Occurrence Record ID:1305407
Long-form Identifier:1:3:1305407:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.0km (1.9 miles) ⓘØrtfjell Mine, Rana Mines, Dunderland Valley, Rana, Nordland, Norway
9.4km (5.9 miles) ⓘØrtvann Mine, Rana Mines, Dunderland Valley, Rana, Nordland, Norway
9.6km (6.0 miles) ⓘStorforshei, Rana, Nordland, Norway
13.6km (8.4 miles) ⓘFinnkåteng Mine, Rana Mines, Dunderland Valley, Rana, Nordland, Norway
28.4km (17.6 miles) ⓘSvabo Mine, Mofjellet, Rana, Nordland, Norway
29.5km (18.3 miles) ⓘDahl prospect, Mofjellet, Rana, Nordland, Norway
29.6km (18.4 miles) ⓘMofjellet Base Metal Mine, Mofjellet, Rana, Nordland, Norway
29.7km (18.4 miles) ⓘNasafjäll Mine, Arjeplog, Norrbotten County, Sweden
35.7km (22.2 miles) ⓘAltermark talc mine, Altermark area, Rana, Nordland, Norway
38.4km (23.9 miles) ⓘSteinåga copper prospect, Beiarn, Nordland, Norway
References
Geological Survey of Norway. The Ore Database. Deposit Area 1833 - 117. Ørtfjell-øst.
 
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