Dustless Chalk Powder is a processed variant of Gypsum Powder. Gypsum is a natural mineral, and is a comparatively soft sulfate mineral. It is mainly composed of calcium sulfate dihydrate (chemical formula is CaSO4·2H2O).Gypsum is a soft mineral which looks either white, or has a whitish-gray tinge. Price : INR 12,000 - 14,500 per Metric Tonne (1000 kg) Formula : CaSO4�·2H2O(Calcium (Ca): 29.4%, Sulfur (S): 23.5%) Packaging : 20kg, 25kg, 30kg, 38kg and 40kg Minimum Order Quantity : 5 Metric Tonne (5000 kg) Transport : Cargo (by ship), Road, Train