These pyrite crystals show a very uncommon combination of crystal forms. Some people have described the crystals from this find as “curved” or “rounded” octahedra, but looking a bit more closely, that is not at all what they are. In fact, they are a combination of octahedron and trapezohedron, where the triangular octahedral faces are surrounded by stepped/striated trapezohedral faces. So cool! Steve acquired this specimen from the pyrite collection of Al Mura, the year he sold his collection at the Rochester Mineralogical Symposium. The pyrite crystals are sharp and mirror-bright. In excellent condition, no damage, a couple of incomplete crystals at the periphery. A great crystal specimen, particularly if you like isometric crystals.