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While externally similar shapes, these two minerals are very different inside.
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Powellite from
Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA


09802530017367214261246.jpg
Powellite, etc.

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
09802530017367214261246.jpg
Powellite, etc.

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
01154410017367214283503.jpg
Powellite, etc.

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
Locality type:Quarry
Classification
Species:Powellite
Formula:Ca(MoO4)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Molybdenite1
Data
Mineral Data:Click here to view Powellite data
Locality Data:Click here to view Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
Data Identifiers
Mindat Occurrence Record ID:26416
Long-form Identifier:1:3:26416:7
GUID (UUID V4):0
Nearest other occurrences of Powellite
58.5km (36.3 miles) ⓘCogswell deposit, Cogswell Reservoir, Los Angeles County, California, USA
87.0km (54.1 miles) ⓘRed Hills prospect (L. Shouse Mines), Ord Mountain, Ord Mountains, Ord Mining District, San Bernardino County, California, USA
References
[micromounts@yahoogroups.com]
 
and/or  
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