Inclusions: All-natural Gypsum crystals normally have inclusions, which are overseas minerals or materials trapped inside the crystal structure in the course of formation. Frequent inclusions in gypsum is often clay minerals, iron oxides that cause coloration, and even very small gas bubbles. Around geological time scales, these crystals accumulate, forming https://www.propanraya.com/id/produk/eco-gypsum-ee-4050