Definition of "boracite" [bo•ra•cite]

• A mixed chloride and borate of magnesium that occurs as a white to green crystalline evaporite, with the chemical formula Mg3B7O13Cl. (noun)

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• "The sanjak is rich in mineral wealth; silver mines are worked at Balia and boracite mines at"
• "The principal boron minerals are borax or "tincal" (hydrated sodium borate), colemanite (hydrated calcium borate), ulexite (hydrated calcium-sodium borate), and boracite (magnesium chloro-borate)."
• "When such water evaporates, it becomes concentrated, along with the magnesium and potassium salts, in the "mother liquor"; and upon complete evaporation, it crystallizes out as boracite and other rarer minerals."