Cleavage: Cleavage refers to a mineral's inclination to break together specific planes of weak spot. Gypsum exhibits ideal cleavage in one route and superior cleavage in another direction. This permits it to interrupt into predictable flat or a little bit angled pieces. Agates: A type of quartz that types in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050