{"id":24306,"count":3,"description":"Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4\u00b72H2O. It is found in alabaster, a decorative stone used in Ancient Egypt. It is the second softest mineral on the Mohs Hardness Scale. It forms as an evaporite, as do salts (or, halides), but it is not a salt. Gypsum belongs to the sulfate group of minerals.\nThe word gypsum is derived from the Greek word \u03b3\u03cd\u03c8\u03bf\u03c2 gypsos, \"chalk\" or \"plaster\". Because the gypsum from the quarries of the Montmartre district of Paris has long furnished burnt gypsum used for various purposes, this material has been called plaster of Paris.\nGypsum was known in Old English as sp\u00e6rst\u0101n, spear stone, referring to its crystalline projections. (Thus, the word spar in mineralogy is by way of comparison to gypsum, referring to any non-ore mineral or crystal that forms in spearlike projections.) In the early nineteenth century it was regarded as an almost miraculous fertilizer. American farmers were so anxious to...","link":"https:\/\/www.skateboarding-lessons.com\/go\/tag\/gypsum\/","name":"Gypsum","slug":"gypsum","taxonomy":"post_tag","meta":[],"_links":{"self":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/tags\/24306","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/posts?tags=24306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}