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Opal from
Tangganshan Mine, Heshan District, Yiyang Prefecture, Hunan Province, China

Description
Quality of samples:	not specified / average specimens
Confirmation
Validity:	Believed Valid
References
References:	Ziqiang Wei (1976): Geology and Prospecting 12(8), 25-29
Data
Mineral Data:	Click here to view Opal data
Locality Data:	Click here to view Tangganshan Mine, Heshan District, Yiyang Prefecture, Hunan Province, China

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