Halite And gypsum each variety clear crystals that are incredibly tender and they are very easily scratched. Licking a sample will immediately distinguish the two, as halite has the identical composition as desk salt and an exceedingly exclusive ‘salty’ flavor. For individuals who dislike the idea of licking mineral samples, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050
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