Inclusions: Organic Gypsum crystals generally incorporate inclusions, that are foreign minerals or materials trapped in the crystal structure all through formation. Typical inclusions in gypsum might be clay minerals, iron oxides that trigger coloration, or even very small fuel bubbles. Crystal System: Gypsum crystals belong to the monoclinic crystal technique. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050