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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Xonotlite from
Unnamed Xonotlite occurrence [1], Priest Valley, Monterey County, California, USA


Locality type:Valley
Classification
Species:Xonotlite
Formula:Ca6(Si6O17)(OH)2
Comments:Occurs in veins ½ inch (1.25 cm) to 2 inches (5.0 cm) in metamorphic rocks in a stream bed.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Thomsonite Subgroup
Data
Mineral Data:Click here to view Xonotlite data
Locality Data:Click here to view Unnamed Xonotlite occurrence [1], Priest Valley, Monterey County, California, USA
Data Identifiers
Mindat Occurrence Record ID:646149
Long-form Identifier:1:3:646149:2
GUID (UUID V4):0
References
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 390
 
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