FerberiteThis was one of the very few multi twinned pieces from the find of these amazing specimens in June of 2010. This species was sometimes previously referred to as "Wolframite", which was supposed to be an intermediary species between Ferberite and Hubnerite, but has since been discredited. This beautiful piece features a few sharp, highly lustrous, jet black blades of Ferberite which are twinned along the a {100} face. It is not a simple twin consisting

the one most desirable phosphate species extant

Wulff (1904-1998) of Colorado Springs

in allusion to its isolated crystals and their rarity when first found

"sword"-shaped crystal of Vivianite

It is not from the typical Bolivian locality at the Unificada mine in Potosi

ants (Formicidae) and bark beetles (Scolytinae)

striated "cogs" that form the edge of the fairly thick metallic grey crystals

A striking isolated

This is one of the very few specimens of Franckeite that I have seen from the famous Siglo XX mine

Specimen # AMAZWH111906

medium luster

Great condition overall and it’s not often one sees such a fantastic blocky twinned crystal of Vivianite like this