Bismuthinite in calcite
description: LOCALITY: Biggenden Mine, Queensland, Australia 2 1/2" ac The finest examples of bismuthinite were found at Biggenden during the 1980's. This is a high quality specimen. The sharpness of the edges and vertices of the calcite and the roughness of the surfaces of the crystalline calcite confirm that this specimen has not been acid etched. The back of this specimen is rich in bismuthinite. If this specimen was worked on in a lab, it could be greatly improved.
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