Solubility: Gypsum is moderately soluble in drinking water, having a solubility of about two grams for each liter at 25°C. Curiously, gypsum displays retrograde solubility, meaning its solubility decreases as water temperature boosts – contrary to most salts that become more soluble in very hot water. Crystal Process: Gypsum crystals https://www.propanraya.com/id/produk/eco-gypsum-ee-4050