{"product_id":"snowflake-obsidian-9","title":"Snowflake obsidian","description":"\u003cp\u003eSnowflake obsidian from Mexico\u003c\/p\u003e\n\u003cp\u003eSize-\u003cbr\u003e5.7cm x 3.7cm x 2.5cm\u003c\/p\u003e\n\u003cp\u003eWeight-\u003cbr\u003e59g\u003c\/p\u003e\n\u003cp\u003eYou will receive the item in the photo\u003c\/p\u003e\n\u003cp\u003eSnowflake obsidian is a natural volcanic glass featuring distinctive gray-to-white radial crystal clusters that resemble snowflakes.\u003c\/p\u003e\n\u003cp\u003eCrystal system- Amorphous (it lacks an ordered internal atomic structure because it is a supercooled glass). How ever,the “snowflake “ inclusions consist of micro-crystals of cristobalite (a high temperature silica polymorph) which individually possess a tetragonal crystal structure.\u003cbr\u003eMineral class - classified as a mineraloid rather then a true mineral,because its overall structure is non-crystalline. \u003cbr\u003eHardness- 5-5.5 on MOHs scale.\u003cbr\u003eRock formation: \u003cbr\u003eRock type- Extrusive igneous rock,\u003cbr\u003eFormation process- forms when silica rich felsic (holistic) lava cools rapidly at the margins of a lava flow,preventing large scale mineral nucleation.\u003cbr\u003eThe snowflakes- over thousands to millions of years,the unstable volcanic glass undergoes a slow aging process called devitrification ,during which microscopic clusters of needle like cristobalite grow radially inside the dark glass matrix to create the characteristic white patterns.\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62438556074371,"sku":null,"price":5.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/IMG-0763.heic?v=1787403957","url":"https:\/\/crystalandfossils.co.uk\/products\/snowflake-obsidian-9","provider":"Crystal and fossils","version":"1.0","type":"link"}