Bournonite (“cogwheels”) black There is an interesting white

There is an interesting white "vein" of Microcline running through the center of one of the Amazonite crystals

Good Bolivian Coppers are not common on the market

which is typically what you would expect out of a metamorphic contact like this

Specimen # CUAUS72011

Considering the millions of tons of tin ore that Bolivia has yielded

Bournonite (“cogwheels”) black There is an interesting whiteA hard to find "cogwheel" group of sharp, thick, blocky modified twinned crystals of Bournonite with excellent metallic luster. The piece displays well from a few angles. The stacked appearance of the crystals, combined with the bright luster, makes this one of the more eye catching smaller Bournonites available. Specimen # BOL711B23