Glossary of Terms
Pyritohedron
Twelve sided polyhedron that has all sides equidimensional and pentagonal. Minerals shaped as pyritohedrons belong to the isometric crystal system.
Plural of pyritohedron is either pyritohedra or pyritohedrons.
3D Animated Illustration of a Pyrite Pyritohedron
Crystals kindly provided by
Smorf