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one of the best Sphalerites that I know of from this tungsten mine in northern Bolivia
This piece is from the type locality for this material which was discovered along the Contacto and San Jose veins in this mine and was first described by Sam Gordon and Mark Bandy
This piece is a great
colorful minerals
Cassiterite on Quartz Augelite one of the best SphaleritesThe 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 classic,
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