This is one of the rarest sulfosalts in the world. This specimen is a very rich, incredibly rare, superb quality, crystallized specimen of the triclinic Lead, Tin, Iron, Antimony sulfosalt Franckeite consisting of "sphere"-shaped aggregates. A good opportunity to acquire something that is rarely offered in the open market. This species belongs to the only group of minerals that forms in naturally "round" or "cylindrical" shaped crystals. This specimen is over 30 years old and was part of the best find of the material. 6.0 x 4.3 x 3.3cm