Inclusions: Normal gypsum crystals often have inclusions, that happen to be foreign minerals or products trapped in the crystal framework during formation. Typical inclusions in gypsum is often clay minerals, iron oxides that bring about coloration, or maybe small fuel bubbles. In excess of geological time scales, these crystals accumulate, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050