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Wurtzite inverted to Sphalerite with Chalcocite, Pyrite, Quartz, Fluorapatite
specimen number:
3671011
location:
Steward mine, Butte, Silver Bow Co., Montana, USA
description: Crystal grouping of platy what were once wurtzite to 1.5 cm across, this now inverted to sphalerite and set on a matrix of crystallized quartz with chalcocite, pyrite, and fluorapatite. Slight micro-chipping present, still in good condition. Very neat example from this old classic mining district.
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