DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
A group of clustered cubic crystals of pyrite (iron disulphide), commonly known as fool's gold. It is an abundant sulphide mineral that occurs in many types of geological environments and rocks. When crystalline, it may forms perfect cubes (hexaeders) with smooth or striated metallic surfaces. Actual width of specimen is 160 mm.
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