Gypsum Takes place in two main versions as white earthy masses or as clear crystals. In crystal kind, its softness and one ideal cleavage with two fewer properly-formulated cleavage directions commonly provide to distinguish gypsum from other related-hunting minerals. This dampness resistant gypsum board is not hard to identify by https://www.propanraya.com/id/produk/eco-gypsum-ee-4050