Transparency: Gypsum Can vary from clear to translucent, according to the crystal formation and presence of inclusions. Transparent crystals enable light-weight to pass through Evidently, whilst translucent specimens allow for some light-weight passage but seem cloudy or hazy. Gypsum are available in hydrothermal veins, which happen to be fractures in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050