CassiteriteThis locality bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. Several great, sharp, semi lustrous, beautiful, well formed black and brown cyclic twinned crystals make for an appealing display piece. A slight brown color can be seen when

This miniature sized specimen features a few sharp

This piece features a few excellent quality

silvery acicular "spray" of Jamesonite needles

big bladed "sword"-shaped crystal of Brookite measuring 1

so it's not a broken "chunk"

thus destroying a large percentage of specimens that would have made their way to the market

and certainly one of the more interesting and eye-catching pieces that I’ve offered

but the other staple species found here is Boracite

Rarely does one see such a large “ball” of Wavellite like this one

and the effect of the "phantoms" is rarely seen in Brookite in my experience

It’s an aesthetic specimen with the Ludlamite “ball” smartly propped up at the top of the piece

The left edge of the crystal has a contact