Cassiterite (GEM quality!) Sigloite this piece is associated with

this piece is associated with the incredibly rare

steel grey crystals of this rare lead

If you’re a Sphalerite collector or a Bolivian mineral collector

but some of the nicest Jamesonite specimens I've seen are from Bolivia

It’s rare to find a pair of intergrown twins like this from Tasna

Cassiterite (GEM quality!) Sigloite this piece is associated withA very impressive and certainly hard to find GEM quality Cassiterite specimen from the famous Viloco Mine. This 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. A fine, sharp, lustrous, beautiful, well formed cyclic twinned