Gypsum happens in two main types as white earthy masses or as apparent crystals. In crystal form, its softness and one ideal cleavage with two considerably less effectively-formulated cleavage directions commonly serve to tell apart gypsum from other equivalent-looking minerals. Gypsum is easily the most plentiful sulfate mineral in the https://www.propanraya.com/id/produk/eco-gypsum-ee-4050