Transparency: Gypsum Can range from transparent to translucent, with regards to the crystal development and existence of inclusions. Clear crystals enable gentle to pass through Plainly, even though translucent specimens enable some gentle passage but look cloudy or hazy. Gypsum is calcium sulfate, a In a natural way occurring mineral. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050