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datolite





datolite
A colorless or white orthosilicate mineral, basic calcium borosilicate (CaBSiO4[OH]), found in cavities in trap-rock. It occurs as monoclinic system crystals, or, rarely, as granular masses. Hardness 5–5.5; relative density 2.9.


Related category

   • GEOLOGY AND PLANETARY SCIENCE

Source: U.S. Geological Survey