FerberiteA classic V shaped or heart shaped twin (twinned along the {100} face) of Ferberite from the famous Tasna mine in far southern Bolivia. This locality has produced what must be the finest twinned Ferberite crystals extant. Ferberite as a species is not known in well crystallized examples worldwide, and the twins from Tasna are a favorite among collectors. This twin is a great example of this material as it shows a fairly open twin, with aesthetic form.

prismatic crystal with a beautiful termination

jet-black twinned crystal of Ferberite (twinned along the a{100} face)

In addition to the good quality of the Wavellites

one of the best Sphalerites that I know of from this tungsten mine in northern Bolivia

and rare light green Paravauxite crystals on the back/reverse side of the specimen

Truly a magnificent example of this wonderful material from Colombia

black to very dark golden colored cyclic twinned crystal group which is associated with small acicular crystals of rarely seen greenish-brown Tourmaline

This is an aesthetic specimen from this classic Bolivian locality

they are wonderful unique and interesting specimens

well-formed black and brown cyclic twinned crystals make for an appealing display piece

The terminations on the above specimen are very sharp and lustrous

Specimen # BOL711B60