Galena (penetration twin)
specimen number:
1115203
location:
Casteel No. 35 mine, Viburnum Trend, Iron Co., Missouri, USA
description:
Lustrous cubic penetration twinned crystals of galena on matrix. In all my years of selling material from this mining district, I have only seen a few galena specimens featuring penetration twinning like this. In very good condition. Minor quartz is present.
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