{"product_id":"luxullianite-2","title":"Luxullianite","description":"\u003cp\u003eLuxullianite from Luxulyan Cornwall UK\u003c\/p\u003e\n\u003cp\u003eSize-\u003cbr\u003e7.2cm x 5.2cm x 3.5cm\u003c\/p\u003e\n\u003cp\u003eWeight-\u003cbr\u003e112g\u003c\/p\u003e\n\u003cp\u003eYou will receive the item in the photo\u003c\/p\u003e\n\u003cp\u003eLuxullianite is a rare type of porphyritic iguana rock (specifically a tourmalinized granite) rather than a single mineral.\u003cbr\u003eBecause it is a multi-mineral rock, it does not have a single crystal system or mineral class of its own, its properties are determined by its component minerals (mainly orthoclase feldspar tourmaline and quartz) \u003cbr\u003eIt formed roughly 280 million years ago from st Austell granite complex. As the original granite crystallized,boron- and silica rich hydrothermal\/pegmatitic fluids injected into cavities and cracks. This process known as tourmalinization,chemically altered the rock. It replaced parts of the original matrix with striking needle like black tourmaline clusters while leaving the large salmon pink feldspar crystals intact.\u003cbr\u003eThe overall hardness of the rock is 6-7 on the MOHs scale.\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62213634064771,"sku":null,"price":12.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/FullSizeRender_90e308e9-ce89-45aa-be57-e73f663b2d4f.heic?v=1785256439","url":"https:\/\/crystalandfossils.co.uk\/products\/luxullianite-2","provider":"Crystal and fossils","version":"1.0","type":"link"}