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
Transvaal Gold Mine, Southern Cross, Yilgarn Shire, Western Australia, Australia


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 Transvaal Gold Mine, Southern Cross, Yilgarn Shire, Western Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:835599
Long-form Identifier:1:3:835599:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.9km (1.8 miles) ⓘPolaris South Gold Mine, Southern Cross, Yilgarn Shire, Western Australia, Australia
3.9km (2.4 miles) ⓘCornishman Gold Mine, Southern Cross, Yilgarn Shire, Western Australia, Australia
4.0km (2.5 miles) ⓘFraser's Gold Mine, Southern Cross, Yilgarn Shire, Western Australia, Australia
5.3km (3.3 miles) ⓘGolden Pig Gold Mine, Southern Cross, Yilgarn Shire, Western Australia, Australia
10.6km (6.6 miles) ⓘHope's Hill Gold Mine, Southern Cross, Yilgarn Shire, Western Australia, Australia
27.0km (16.8 miles) ⓘJacoletti Gold Mine, Marvel Loch, Yilgarn Shire, Western Australia, Australia
27.2km (16.9 miles) ⓘMarvel Loch Gold Mine, Marvel Loch, Yilgarn Shire, Western Australia, Australia
30.3km (18.8 miles) ⓘMountain King Gold Mine (Donovan's Find; Howlett's Battery), Marvel Loch, Yilgarn Shire, Western Australia, Australia
33.3km (20.7 miles) ⓘEdward's Find Gold Mine, Marvel Loch, Yilgarn Shire, Western Australia, Australia
35.8km (22.3 miles) ⓘNevoria Gold Mine, Marvel Loch, Yilgarn Shire, Western Australia, Australia
References
Hagemann, Steffan G., Brown, Philip E., Ridley, John, Stern, Peter, Fournelle, John (1998) Ore petrology, chemistry, and timing of electrum in the Archean hypozonal Transvaal lode gold deposit, Western Australia. Economic Geology, 93 (3) 271-291 doi:10.2113/gsecongeo.93.3.271
 
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