Barite on copper
description: LOCALITY: White Pine Mine, Ontonagon County, Michigan, USA 3" tall The barite crystal is transparent and displays the luster of polished glass. One of the crystal ends is a termination. The barite crystal is on a matrix of native copper. Hence, this is a rare association piece. This type of association is documented in the mineralogical literature. Under the microscope, it can be seen that one a copper spinal twin includes the barite crystal. The inclusion is continuous with part of the spinal twin outside the barite crystal.

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