Pyrite crystals, a selection of specimens of this crystallized mineral species. Pyrite is a mineral, here many collectibles presented with a description, one or more photos and sometimes a video. These pyrites are for sale.
It is an iron disulfide, of chemical formula FeS2, and of the cubic crystal system, polymorph of the marcasite, of the same chemical composition but crystallizing in the orthorhombic system.