Cassiterite (GEM quality!) Sigloite beautiful blue color

beautiful blue color

steel grey crystals of this rare lead

which hopefully could one day produce specimens of the same size and quality as those from Unificada

the piece is in great shape all the way around

this is a good representative piece

Cassiterite (GEM quality!) Sigloite beautiful blue colorA 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