{"product_id":"obsidian-arrowhead-2","title":"Obsidian arrowhead","description":"\u003cp\u003eObsidian arrowhead\u003c\/p\u003e\n\u003cp\u003eYou will be picked one out at random\u003c\/p\u003e\n\u003cp\u003eObsidian is a naturally occurring volcanic glass rather than a mineral. Because of this,it has no crystal system and an amorphous (random) internal structure.\u003c\/p\u003e\n\u003cp\u003eMineral class: obsidian is not a mineral it is technically classified as a mineraloid. It is composed primarily of silicon dioxide along with variable trace impurities (like iron and magnesium) that give it colour.\u003c\/p\u003e\n\u003cp\u003eRock formation: Obsidian forms as an extrusive igneous rocks. It is created when silica rich felsic lava extrudes from a volcano and cools so rapidly that atoms cannot arrange themselves into a structure,crystalline pattern.\u003c\/p\u003e\n\u003cp\u003eHardness: measures between 5.0-5.5 on the MOHs scale.\u003c\/p\u003e\n\u003cp\u003eWhen broken it fractures in smooth curved surfaces which creates the sharpest natural edges known.\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62280122335619,"sku":null,"price":3.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/IMG-0167_5c7d3410-f81e-455d-902f-f0886b336f8b.heic?v=1785602660","url":"https:\/\/crystalandfossils.co.uk\/products\/obsidian-arrowhead-2","provider":"Crystal and fossils","version":"1.0","type":"link"}