All minerals fit into seven crystal systems. Minerals in the same crystal system often have some similar internal and external characteristics. The crystal systems are cubic or isometric, tetragonal, hexagonal, trigonal or rhombohedral, orthorhombic, monoclinic, and triclinic.
Photo: Peter Johnston/GIA. Courtesy: GIA. Resource: Amanda. #eClarity
These crystals are great to see and read. Thanks for sharing.
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