Cleavage: Cleavage Refers to the mineral's tendency to break alongside specific planes of weakness. Gypsum exhibits excellent cleavage in one direction and superior cleavage in another direction. This permits it to break into predictable flat or marginally angled parts. Fibrous satin-spar’s chatoyancy results from parallel alignment of fibers that mirror https://www.propanraya.com/id/produk/eco-gypsum-ee-4050