One of the rarest sulfides in the world, occurring almost exclusively from Bolivia. This specimen is a very rich, incredibly rare, superb quality, crystallized specimen of this triclinic lead, tin, iron, antimony sulfosalt. This mineral is exceptionally hard to find in good displays specimens, and less than 1% of all specimens I have ever seen were on matrix! Typical specimens from this mine are crude, crypto-crystalline masses, but this one has excellent, well defined, isolated, sharp crystals oriented into spherical aggregates. A great miniature size specimen for somebody looking to own a rare and highly displayable mineral specimen. This stash presents a great opportunity to acquire a superb collector quality specimen that is rarely offered in today's market. The piece is easily over 25 years old as this matrix indicates that it came from one of the upper levels of the mine. 4.5 x 4 x 1.5 cm