Galena
specimen number:
4481143
location:
Grace Walker mine, Picher field, Tri-State district, Oklahoma, USA
description:
Mostly lustrous crystals of galena, one of these exhibiting twinning and measuring to 3.8 cm in length, on matrix. Sphalerite present as well. The previous label refers to this is one spinel law twin, I think it is more a flattened penetration twin. In very good condition.
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