Cassiterite with Topaz, Goethite after Pyrite, Quartz
specimen number:
3774453
location:
Climax mine, Lake Co., Colorado, USA
description:
A lustrous black crystal of cassiterite 0.5 cm in size set on matrix with topaz. Tiny crystals of goethite after pyrite are scattered across the top of the cassiterite crystal. Quartz present as well. Collected in October, 1996, identification has been confirmed.
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