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Large Copper on Acrylic Base
Large Copper on Acrylic Base Quincy Mine, Hancock, Houghton County, Michigan, USA An intriguing mass of mostly interstitial copper. As a whole, th...
Copper on Prehnite with Epidote Osceola Mine, Houghton Co., Michigan, USA A superb example of a vein section featuring a vug with a wonderful asso...