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
Södra Hackspikgruvan, Smörberg ore field, Norberg, Västmanland County, Sweden


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 Södra Hackspikgruvan, Smörberg ore field, Norberg, Västmanland County, Sweden
Data Identifiers
Mindat Occurrence Record ID:88729
Long-form Identifier:1:3:88729:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.3km (0.8 miles) ⓘUnga Assersorskan Mine, Norberg, Västmanland County, Sweden
6.9km (4.3 miles) ⓘHäste ore field, Norberg, Västmanland County, Sweden
7.0km (4.3 miles) ⓘStripåsen Mine, Häste ore field, Norberg, Västmanland County, Sweden
26.3km (16.3 miles) ⓘLövsved Mine, Folkärna, Avesta, Dalarna County, Sweden
28.4km (17.7 miles) ⓘRyllshyttan, Hedemora, Dalarna County, Sweden
30.1km (18.7 miles) ⓘGarpenberg Södra Mine, Garpenberg, Hedemora, Dalarna County, Sweden
31.2km (19.4 miles) ⓘStålklockan mine, Riddarhyttan, Skinnskatteberg, Västmanland County, Sweden
32.2km (20.0 miles) ⓘLappberget deposit, Garpenberg, Hedemora, Dalarna County, Sweden
32.3km (20.1 miles) ⓘGamla Bastnäs deposit, Bastnäs Mines, Riddarhyttan, Skinnskatteberg, Västmanland County, Sweden
34.6km (21.5 miles) ⓘHans Urbansson mine field, Riddarhyttan, Skinnskatteberg, Västmanland County, Sweden
References
Andersson, Stefan S.; Jonsson, Erik; Sadeghi, Martiya (2024) A synthesis of the REE-Fe-polymetallic mineral system of the REE-line, Bergslagen, Sweden: New mineralogical and textural-paragenetic constraints. Ore Geology Reviews, 174. 106275 doi:10.1016/j.oregeorev.2024.106275
 
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