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Opal from
Barker-Ferguson Mine, Keystone, Keystone District, Pennington Co., South Dakota, USA

Description
Quality of samples:	not specified / average specimens
Confirmation
Validity:	Believed Valid
References
References:	R&M 75:3 pp 156-169
Data
Mineral Data:	Click here to view Opal data
Locality Data:	Click here to view Barker-Ferguson Mine, Keystone, Keystone District, Pennington Co., South Dakota, USA

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Current server date and time: 19th May 2013 01:55:46