Vivianite Pyrrhotite A cool cabinet sized specimen

A cool cabinet sized specimen of a species that is rarely offered for sale on the market

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

let alone with such attractive associated species

You can read Willard's bio on the Mineralogical Record website

with only a few small nicks to the Ludlamite groups

Vivianite Pyrrhotite A cool cabinet sized specimenThese 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