Product Short Description: Rate VALID for minimum order qty of 5 MT Product Description: The Gypsum stone Powder is a mineral formed by di-hidrated calcium sulphate. In its crystalline structure there are two water molecules by one of calcium sulphate. Put under calcination (120-160 ºC), it releases part of the crystal water, obtaining itself a semihydrate of calcium sulphate or “burnt gypsum”, that being mixed with water, is solidified again and crystallized, reconstituting the original rock in its natural state.