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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Vermiculite from
Tulare County, California, USA


Locality type:County
Classification
Species:Vermiculite
Formula:Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Comments:Reported as "jefferisite."
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Vermiculite data
Locality Data:Click here to view Tulare County, California, USA
Data Identifiers
Mindat Occurrence Record ID:683147
Long-form Identifier:1:3:683147:9
GUID (UUID V4):0
References
Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp.: 244
Murdoch, Joseph; Webb, Robert Wallace (1966) Minerals of California, Centennial Volume (1866-1966) - California Division of Mines and Geology, Bulletin 189. California Division of Mines and Geology. 559 pp.
 
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