Franckeite (rare matrix specimen) Sphalerite producing giant plates of crystals

producing giant plates of crystals and individual singles measuring up to 60 cm (

A really cool Bulgarian sulfide association specimen

These pieces have what I think is some of the best matrix for these crystals from Bolivia

From the amazing find in November 2004

Several very sharp

Franckeite (rare matrix specimen) Sphalerite producing giant plates of crystalsThis specimen was mined in the late 1970s early 1980s. I think it goes without saying that the finest specimens of Franckeite are found at this mine. This is one of my favorite species from Bolivia, as it has an interesting chemistry, unique crystals, and it belongs to the only group of minerals that form naturally round or cylindrical crystals! Keep in mind that this is one of the rarest sulfosalts in the world, and good display specimens of this