Franckeite with Zinkenite (fine and rare)

Item Description

This is one of the rarest sulfosalts in the world. This specimen is a very rich, incredibly rare, superb quality, crystallized specimen of the triclinic lead, tin, iron, antimony sulfosalt Franckeite consisting of somewhat "sword"-shaped crystals forming spherical aggregates which are associated with thin, lustrous prismatic crystals of Zinkenite. A great quality specimen for somebody looking to own a rare and attractive "black" mineral. This is also good opportunity to acquire something that is rarely offered in the open market. This species belongs to the only group of minerals that forms in naturally "round" or "cylindrical" shaped crystals. This specimen is over 30 years old and was part of the best find of the material. There were only a handful of good specimens, and well crystallized pieces like this are few and far between these days. A wonderful rare species (valued at $900 retail in the inventory) from one of the most classic Bolivian mines!