Potosiite (very rare material!)

Item Description

From the great find of 2004. This specimen is a very attractive, incredibly rare, superb quality, crystallized specimen of Potosiite hosting of several, extremely rare, lustrous, heavily striated, tabular blades (some are twinned) of Potosiite measuring up to 4 mm! sitting atop crystallized Franckeite on matrix. For those of you who are unaware, the crystals of Potosiite on this specimen are EXCEPTIONALLY 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. 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 POTOSIITE CRYSTALS IN EXISTENCE. Valued at $600-$750 Retail.