Main Characteristics of these fascinating large pyrite crystals is inclusion of either Quartz crystals, Quartz matrix, or Black Sphalerite minerals. The clusters formations may have either one or combination of small or big octahedron, and pyritohedron and cubic crystals with bright glistening, striated or non-striated faces. Excellent addition to your geological collection, crystals on these formations are complete and prominent on the front while fused with adjacent crystal on the inner side. These aesthetically pleasing natural specimens are perfect as decorative pieces, as a gift, for jewelry making or to benefit from metaphysical properties. Weights of each item is given in variants titles.