Inclusions: Natural gypsum crystals generally consist of inclusions, which are foreign minerals or resources trapped in the crystal construction in the course of development. Typical inclusions in gypsum may be clay minerals, iron oxides that result in coloration, or even very small gasoline bubbles. Crystal Method: Gypsum crystals belong towards https://www.propanraya.com/id/produk/eco-gypsum-ee-4050