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Piemontite from
Unnamed Mn-Asbestos-Zeolite occurrence (1), Shadow Lake, Minarets Mining District (Mountain Mining District; Raymond Mining District; Minaret Mining District), Ritter Range, Madera County, California, USA


Locality type:Occurrence
Classification
Species:Piemontite
Formula:(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Comments:Occurs as minute needles in a sericite schist, about 100 yards (95 meters) downstream from the outlet of Shadow Lake.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Calcite
Heulandite Subgroup
Quartz
Stilbite Subgroup
Data
Mineral Data:Click here to view Piemontite data
Locality Data:Click here to view Unnamed Mn-Asbestos-Zeolite occurrence (1), Shadow Lake, Minarets Mining District (Mountain Mining District; Raymond Mining District; Minaret Mining District), Ritter Range, Madera County, California, USA
Data Identifiers
Mindat Occurrence Record ID:678802
Long-form Identifier:1:3:678802:5
GUID (UUID V4):0
Nearest other occurrences of Piemontite
1.0km (0.6 miles) ⓘShadow Lake, Minarets Mining District (Mountain Mining District; Raymond Mining District; Minaret Mining District), Ritter Range, Madera County, California, USA
3.2km (2.0 miles) ⓘUnnamed Mn occurrence (2), Shadow Lake, Minarets Mining District (Mountain Mining District; Raymond Mining District; Minaret Mining District), Ritter Range, Madera County, California, USA
4.7km (2.9 miles) ⓘAgnew Meadow Mine (Agnew Meadow Manganese prospect/deposit; Mammoth Lakes), Olaine Lake, Agnew Meadows, Madera County, California, USA
References
Mayo, Evans B. (1932) Two new occurrences of piedmontite in California. American Mineralogist, 17 (6) 238-247 p.240
Mayo, Evans Blakemore (1933), Discovery of Piedmontite in the Sierra Nevada: California Division Mines Report 29: 239-243
Alfors, John T. (1964), Piemontite from Shadow Lake: California Division Mines & Geology Mineral Information Service: 17: 210
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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