Magnesite is native magnesium carbonate occurring in white compact or granular masses, and also in rhombohedral crystals. It has been used as an ore of metallic magnesium but the primary source of magnesium is sea water. Is a source of magnesia for industrial chemicals. Commonly found in veins and masses derived from the alteration of serpentine through the action of waters containing carbonic acid. Magnesite has the formulae MgCo3 and a relative hardness of 4. Research Magnesite
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