{"product_id":"dendrite-opal-3","title":"Dendrite opal","description":"\u003cp\u003eDendrite opal from India\u003c\/p\u003e\n\u003cp\u003eSize-\u003cbr\u003e4.1cm x 3.6cm x 2.4cm\u003c\/p\u003e\n\u003cp\u003eWeight-\u003cbr\u003e40g\u003c\/p\u003e\n\u003cp\u003eYou will receive the item in the photo\u003c\/p\u003e\n\u003cp\u003eDendrite Opal is a variety of common opal characterized by tree like or fern like branching inclusions made of manganese or iron oxides.\u003cbr\u003eMineral class- Silicate\u003cbr\u003eCrystal system- Amorphous (it had no true crystal structure or lattice) \u003cbr\u003eRock formation:\u003cbr\u003eEnvironment- Volcanic and sedimentary environments where silica-rich groundwater percolates through cavities,fissures and fractures in host rocks (such as sandstone,shale or limestone).\u003cbr\u003eProcess- A low- temperature silica gel or solution deposits hydrous silica dioxide,solidifying into common opal. \u003cbr\u003eSecondary metal-bearing fluids rich in manganese or iron oxides infiltrate microscopic fractures or pores within the semi-solid or hardened silica matrix.\u003cbr\u003eThese metallic minerals precipitate rapidly along the pathways into characteristic (branching tree like) patterns before the entire structure is permanently sealed.\u003cbr\u003eHardness-5.5-6.5 on the MOHs scale\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62800723345795,"sku":null,"price":4.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/FullSizeRender_d3247d45-c5a7-4e8f-8805-f7ccff5f8e9b.heic?v=1791730325","url":"https:\/\/crystalandfossils.co.uk\/products\/dendrite-opal-3","provider":"Crystal and fossils","version":"1.0","type":"link"}