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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Bannisterite from
Brandsnuten manganese deposit, Botnedal, Tokke, Telemark, Norway


Locality type:Deposit
Classification
Species:Bannisterite
Formula:CaMn102+(Si14Al2)O38(OH)8 · nH2O
Comments:Brown, flaky aggregates up to a few cm across = a mixture of bannisterite and caryopilite. First foundd by Unna Lagesen.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bannisterite data
Locality Data:Click here to view Brandsnuten manganese deposit, Botnedal, Tokke, Telemark, Norway
Data Identifiers
Mindat Occurrence Record ID:56116
Long-form Identifier:1:3:56116:7
GUID (UUID V4):0
References
(1985) To førstegangsfunn i Norge [Two first-time discoveries in Norway]. KOG-Nytt. Medlemsblad for Kongsberg og omegn Geologiforening [KOG-News. Member magazine for Kongsberg and surrounding areas Geological Association] 1-2, p.7.
Larsen, Alf Olav (1988) Caryopilitt og bannisteritt - to nye mineraler for Norge [Caryopilite and bannisterite - two new minerals for Norway]. Mineralogisk-Geologisk Museum - Universitetet i Oslo- Interne notater, Geologisk Museums venner. 130-137
van der Wel, Dirk (1999) The Minerals of the Brandsnuten Manganese Deposit, Tokke, Norway. Norsk Bergverksmuseum Skrift, 15. 74-86
Rune S. Selbekk (2010) Norges mineraler - En revidert utgave av Norges mineraler (Neumann 1985) Tapir Akademiske Forlag, Trondheim. p.1-552.p.445
 
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