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Calcite : CaCO3, Prehnite : Ca2Al2Si3O10(OH)2

 
 
minID: HRW-YGG

Calcite : CaCO3, Prehnite : Ca2Al2Si3O10(OH)2

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Here we have a gigantic 4 1/2 x 3 1/4 inch golden Calcite on Prehnite after Glauberite from the Weldon Crushed Stone Quarry in Fanwood, New Jersey. The overall specimen measures 6 x 5 3/4 inches. The calcite is unusually large for this locale. Specimen sold.

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Photo added: 20th Feb 2007