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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Sapphirine from
Nordre Holmevatnet, Tromsø, Troms og Finnmark, Norway


Locality type:Outcrop
Classification
Species:Sapphirine
Formula:Mg4(Mg3Al9)O4[Si3Al9O36]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sapphirine data
Locality Data:Click here to view Nordre Holmevatnet, Tromsø, Troms og Finnmark, Norway
Data Identifiers
Mindat Occurrence Record ID:1014002
Long-form Identifier:1:3:1014002:4
GUID (UUID V4):0
References
Janák, Marian, Uher, Pavel, Ravna, Erling Krogh, Kullerud, Kåre, Vrabec, Mirijam (2015) Chromium-rich kyanite, magnesiostaurolite and corundum in ultrahigh-pressure eclogites (examples from Pohorje Mountains, Slovenia and Tromsø Nappe, Norway) European Journal of Mineralogy, 27 (3) 377-392 doi:10.1127/ejm/2015/0027-2436
 
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