Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Biotite from
Williams Mine (Page Williams Mine), Hemlo gold deposit, Bomby Township, Thunder Bay District, Ontario, 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 Williams Mine (Page Williams Mine), Hemlo gold deposit, Bomby Township, Thunder Bay District, Ontario, Canada
Data Identifiers
Mindat Occurrence Record ID:280333
Long-form Identifier:1:3:280333:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.2km (0.7 miles) ⓘGolden Giant Mine, Hemlo gold deposit, Bomby Township, Thunder Bay District, Ontario, Canada
22.0km (13.7 miles) ⓘBig Lake deposit, Marathon area, Thunder Bay District, Ontario, Canada
31.0km (19.2 miles) ⓘMarathon deposit, Coldwell complex, Thunder Bay District, Ontario, Canada
31.2km (19.4 miles) ⓘFleck occurrence (American Brass; Two Duck Lake), O'Neill Township, Thunder Bay District, Ontario, Canada
43.6km (27.1 miles) ⓘAmeranium prospect (Geordie Lake; Macrae), Seeley Lake Area, Thunder Bay District, Ontario, Canada
47.3km (29.4 miles) ⓘArea 41 deposit, Seeley Lake Area, Thunder Bay District, Ontario, Canada
52.0km (32.3 miles) ⓘGeco Mine, Gemmell Township, Thunder Bay District, Ontario, Canada
69.5km (43.2 miles) ⓘPrairie Lake carbonatite, Killala Lake Area, Thunder Bay District, Ontario, Canada
References
M. Bonnemaison, J. Delair, F. Tollon, Chron. Rech. Min., N° 486, 1987, pp 81-84.
 
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