Cleavage: Cleavage refers to a mineral's inclination to interrupt along precise planes of weak point. Gypsum reveals ideal cleavage in a single route and great cleavage in An additional route. This allows it to interrupt into predictable flat or a little angled pieces. Calcination: The rock is heated in kilns https://www.propanraya.com/id/produk/eco-gypsum-ee-4050