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While externally similar shapes, these two minerals are very different inside.
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Grunerite from
Zlatý Kopec skarn deposit, Zlatý Kopec, Boží Dar, Karlovy Vary District, Karlovy Vary Region, Czech Republic


Locality type:Deposit
Classification
Species:Grunerite
Formula:◻Fe22+Fe52+(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Grunerite data
Locality Data:Click here to view Zlatý Kopec skarn deposit, Zlatý Kopec, Boží Dar, Karlovy Vary District, Karlovy Vary Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:484127
Long-form Identifier:1:3:484127:2
GUID (UUID V4):0
References
Josef Vajdak (2002) Mineral News, 18, #1, 6.
 
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