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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Stilpnomelane from
Morro Velho mine, Nova Lima, Minas Gerais, Brazil


Locality type:Mine
Classification
Species:Stilpnomelane
Formula:K4Fe482+[Si64Al8]O164(OH)52 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilpnomelane data
Locality Data:Click here to view Morro Velho mine, Nova Lima, Minas Gerais, Brazil
Data Identifiers
Mindat Occurrence Record ID:643347
Long-form Identifier:1:3:643347:5
GUID (UUID V4):0
Nearest other occurrences of Stilpnomelane
13.8km (8.6 miles) ⓘCuiabá mine, Sabará, Minas Gerais, Brazil
35.7km (22.2 miles) ⓘSão Bento mine, Santa Bárbara, Minas Gerais, Brazil
38.7km (24.1 miles) ⓘPilar mine, Santa Bárbara, Minas Gerais, Brazil
References
Lobato, Lydia Maria, Ribeiro-Rodrigues, Luiz Cláudio, Vieira, Frederico Wallace Reis (2001) Brazil's premier gold province. Part II: geology and genesis of gold deposits in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero. Mineralium Deposita, 36 (3) 249-277 doi:10.1007/s001260100180
Vial, Diogenes Scipioni; DeWitt, Ed; Lobato, Lydia Maria; Thorman, Charles H. (2007) The geology of the Morro Velho gold deposit in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil. Ore Geology Reviews, 32 (3). doi:10.1016/j.oregeorev.2004.12.008
 
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