Potosiite

Item Description

This specimen is a very attractive, incredibly rare, superb quality, crystallized specimen of the triclinic lead, antimony, iron, tin sulfosalt Potosiite consisting of several, extremely rare, lustrous, striated, tabular blades of Potosiite measuring up to 2 mm 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 for the species. 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 new find has completely redefined the species of Potosiite. This specimen is from the newly opened vein in this historic mine in 2004.