Chrysocolla is a secondary copper mineral with a blue-green color, that some people mistake for turquoise. The main difference is turquoise contains phosphorus and chrysocolla does not.
Chrysocolla in Quartz (Gem Silica) takes a good polish with tin oxide or diamond, followed with green rouge (Zam is a brand name for green rouge). Mohs hardness 5.0 to 6.0.
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Measures (approx) 9/32″ thick.
Measures (approx) 5/16″ thick.
Measures (approx) 5/8″ at the thickest point.