Potosiite (big crystals!)

Item Description

This piece is from the great find of 2004. It is a very attractive, incredibly rare, superb quality, crystallized specimen of Potosiite consisting of several, extremely rare, highly lustrous, heavily striated, tabular blades - some are twinned - sitting atop crystallized and the equally rare triclinic lead, tin, iron, antimony sulfosalt Franckeite. For those of you who are unaware, the crystals of Potosiite on this specimen are rather large. Before these new specimens were discovered, some of the largest known crystals of Potosiite were massive, uncrystallized, granules less than 1 mm. in most cases. This find completely redefined Potosiite. The crystals on this specimen are NOT micros, you can clearly see them with the naked eye and they are very distinct. These are undoubtedly some of the largest known Potosiites ever found. I have been told that the part of the mine that produced these specimens is now mined out and will most likely never produce these impressive specimens again.