Inclusions: All-natural gypsum crystals generally consist of inclusions, which can be overseas minerals or elements trapped in the crystal framework through formation. Widespread inclusions in gypsum is usually clay minerals, iron oxides that cause coloration, or maybe very small gas bubbles. Crystal Method: Gypsum crystals belong for the monoclinic crystal https://www.propanraya.com/id/produk/eco-gypsum-ee-4050