VivianiteA classic single crystal of Vivianite from the famous Siglo XX mine. This superb, very sharp, rather lustrous, gemmy, rich emerald green color, sword shaped crystal is one of the better quality single Vivianites that Ive offered from this famous locality. Subscribers to the Mineralogical Record know that an entire issue was dedicated to this unique and historic locality, and those who are familiar with specimens from this mine know that good quality

metallic Pyrite (pseudomorphs after compressed rhombohedra of Siderite) which are associated with minor grey crystals of the rare sulfide

while the other side is filled with Stilbite

Specimen # BROOK31930

To have a hand sized display specimen of Augelite from Bolivia

Specimen # BOL711B162

This piece features rare

Specimen # BOL711B12

This is only one of the few pieces of this material that I have seen in my life where Rhodochrosite and Stilbite occur together on the same specimen

aesthetics and displayability are secondary only to the superb quality of the Barite crystals themselves

These specimens were extracted from the same vein system worked by the father of Bolivian mineralogy

It is so unbelievably rare to find good size

It is associated with a few smaller (but not small by any means) Augelites of similar quality