Halite And gypsum both of those type very clear crystals that are quite smooth and are conveniently scratched. Licking a sample will swiftly distinguish the two, as halite has the identical composition as table salt and an exceedingly distinct ‘salty’ taste. For those who dislike the concept of licking mineral https://www.propanraya.com/id/produk/eco-gypsum-ee-4050