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While externally similar shapes, these two minerals are very different inside.
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Moonstone from
Unnamed Gemstone occurrence [1], Funeral Mts (Funeral Range), Amargosa Range, Inyo County, California, USA


Locality type:Occurrence
Classification
Species:'Moonstone' (not an IMA approved species)
Comments:Occurs as small crystals in rhyolite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Moonstone data
Locality Data:Click here to view Unnamed Gemstone occurrence [1], Funeral Mts (Funeral Range), Amargosa Range, Inyo County, California, USA
Data Identifiers
Mindat Occurrence Record ID:646880
Long-form Identifier:1:3:646880:4
GUID (UUID V4):0
References
Kunz, George Frederick (1904), Precious stones: Mineral Resources U.S., 1903: 950
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 184.
 
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