Cryptocrystalline Magnesite MgCO3 with extremely low silica and iron content, white colour, and very low level of heavy metals. RMA is a raw magnesite milled product with 90% MgO content on ignited basis, which is used in the production of ceramics (tiles etc.). Magnesium Carbonate: isolation, rubber, ink, glass, ceramics, paint, pharmacy and cosmetics industry. Magnesium Chloride: Magnesium metal production, textile, paper, ceramics and cement. Magnesium sulphate: Pharmaceutics, artificial fertilizer industry.