Cleavage: Cleavage Refers to some mineral's tendency to break together specific planes of weakness. Gypsum displays fantastic cleavage in one direction and fantastic cleavage in another way. This permits it to break into predictable flat or marginally angled pieces. Gypsum is probably the oldest and most widely employed design supplies, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050
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