Cleavage: Cleavage refers to a mineral's inclination to break along certain planes of weakness. Gypsum reveals great cleavage in a single direction and fantastic cleavage in another path. This permits it to interrupt into predictable flat or slightly angled pieces. Area mining will involve eradicating overburden to reveal the gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050