Inclusions: Purely Natural gypsum crystals usually comprise inclusions, that happen to be foreign minerals or supplies trapped in the crystal construction during formation. Typical inclusions in gypsum is usually clay minerals, iron oxides that cause coloration, or perhaps little gas bubbles. Over geological time scales, these crystals accumulate, forming wide https://www.propanraya.com/id/produk/eco-gypsum-ee-4050