Arsenopyrite with Pyrite
specimen number:
3773382
location:
Double Rainbow mine, Lawrence Co., South Dakota, USA
description:
Twinned crystals of arsenopyrite to 0.4 cm in size on a pyrite matrix. Previous label notes that this was collected by Bill Roberts of Rapid City, South Dakota. The pyrite matrix is a little loose but the piece still solid at the time of this writing.
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Related by Mineral (Arsenopyrite):
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