Bournonite with Tetrahedrite, Sphalerite, Pyrite, Quartz
specimen number:
3631533
location:
Black Pine mine, Granite Co., Montana, USA
description:
Semi lustrous twinned crystals of bournonite to 0.7 cm in size and a grouping along the lower right edge of this cluster of glassy gemmy quartz crystals. Naturally crystallized all around with very slight micro-chipping present, this in good condition. Tetrahedrite, sphalerite, and pyrite present as well. Bournonite is not very common from this closed locality.
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