{"product_id":"chalcedony-13","title":"Chalcedony","description":"\u003cp\u003eChalcedony\u003c\/p\u003e\n\u003cp\u003eWeight \u003cbr\u003e 5-10g\u003c\/p\u003e\n\u003cp\u003eYou will be picked one at random\u003c\/p\u003e\n\u003cp\u003eChalcedony is a cryptocrystalline form of silica, meaning it consists of fine intergrowths of quartz and morganite, which are to small to be seen without a high magnification. \u003cbr\u003eThe Crystal system is trigonal due to its primary quartz composition or monoclinic due to its morganite component.\u003cbr\u003eIt belongs to the silicates mineral class and its hardness 6.5-7 on the MOHs scale.\u003cbr\u003eChalcedony is generally a secondary mineral, forming in low temperatures and pressures typically at or near the earths surface.\u003cbr\u003eIt is found as nodules, conceptions or layers in limestone and marks as well as cementing agents in sandstone. \u003cbr\u003eIt precipitates from low temperature hydrothermal solutions. Chalcedony frequently replaces organic material e.g petrified wood,fossils or other minerals.\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":58262088384899,"sku":null,"price":3.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/FullSizeRender_0346ab06-7c05-4b3f-ba37-aa28fb53840e.heic?v=1781632973","url":"https:\/\/crystalandfossils.co.uk\/products\/chalcedony-13","provider":"Crystal and fossils","version":"1.0","type":"link"}