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Perthite from
Rollstone Hill Quarry, Fitchburg, Worcester Co., Massachusetts, USA

Description
Quality of samples:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Rarity at site:Extremely common
Confirmation
Validity:Believed Valid
References
References:AmMin 20(1):1-24
Data
Mineral Data:Click here to view Perthite data
Locality Data:Click here to view Rollstone Hill Quarry, Fitchburg, Worcester Co., Massachusetts, USA
Mineral and/or Locality
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