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The biggest problem with a lot of “black” rocks (because of my affinity for them
The main focal point of the piece is the 1
acicular spray of Zinkenite crystals
This impressive and attractive twin has wonderful blocky form with very sharp faces
one of the best Sphalerites that I know of from this tungsten mine in northern Bolivia
Cassiterite lead The biggest problem with aThe Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today and 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. This piece features several
