Inclusions: Organic gypsum crystals normally consist of inclusions, that are foreign minerals or supplies trapped inside the crystal composition throughout formation. Popular inclusions in gypsum may be clay minerals, iron oxides that trigger coloration, or even very small gas bubbles. Agates: A kind of quartz that kinds in volcanic rock. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050