Global Magnesium Carbonate Market By Type (Light Magnesium Carbonate , and Heavy Magnesium Carbonate), By Application (Pharmaceuticals , Plastic & Rubber Industry , Personal Care & Cosmetics , Paints & Inks , Pulp & Paper Industry , Fire Extinguishing , and Compositions), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029