Vivianite Pyrrhotite This piece is one of

This piece is one of the single largest twinned Cassiterites from Viloco that I’ve handled

but in great shape on the display side

This piece features a few rare

Chicote Grande is one of the "forgotten" mines in Bolivia over the last 20 years as very little material has been available

Vivianite Pyrrhotite This piece is one ofThese Vivianite crystals have, without question, the best luster and often gemminess of any Vivianite specimens to date from this country, or virtually any other country. Another outstanding feature is the wonderful color contrast between the vivid emerald green of the Vivianite and the altered red sandstone matrix. These pieces have what I think is some of the best matrix for these crystals from Bolivia. It's not completely unstable like decomposing