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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Mountain Leather from
Ben Lomond Mountain, Santa Cruz County, California, USA


Locality type:Mountain
Classification
Species:Asbestos var: Mountain Leather
Comments:A variety of tremolite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Mountain Leather data
Locality Data:Click here to view Ben Lomond Mountain, Santa Cruz County, California, USA
Data Identifiers
Mindat Occurrence Record ID:677603
Long-form Identifier:1:3:677603:9
GUID (UUID V4):0
References
Fitch, A.A. (1931), The geology of Ben Lomond Mountain, California: University of California Department of Geological Sciences Bulletin: 21: 9
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 68
 
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