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© ALEX COOPER AUCTIONEERS, Inc., Towson, MD, USA
THREE SPECIMENS OF NATIVE COPPER Comprising a specimen of copper and Prehnite, from Osceola Mine, Ahmeek, Houghton Co. MI, 2 1/2 x 2 1/4 x 2 1/2 in.; a...
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a specimen of copper and Prehnite, from Osceola Mine, Ahmeek, Houghton Co. MI, 2 1/2 x 2 1/4 x 2 1/2 in.; a crystalline nugget, from Caledonia Mine, Ontonagon Co., MI, 3 1/2...
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From the estate of Frank Hall owner of Dover Scientific...
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