{"product_id":"dolomite-cast-with-duftite","title":"DOLOMITE cast   with DUFTITE","description":"This fine large display specimen from Tsumeb mine features a classic Dolomite cast for which this mine is famed. A thin layer of greyish-white pearlescent Dolomite appears to have coated, or epimorphed, Calcite crystals, creating a cast of their original external form. To add to the attraction, and complexity, the thin layer of Dolomite extends outwards and upwards, creating a somewhat bowl-like form, and having a thin reddish-brown internal layer, suggesting that its composition shifted slightly during growth. Patches of green Duftite - a lead copper arsenate species - add rarity to this piece, forming finely crystallized coatings on both sides, but more extensively on the rear of the specimen. Ex Weyand Collection.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781463220559,"sku":"CC52590","price":1110.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC52590_956f511b-a34b-4541-8f06-371fd46bf94f.jpg?v=1783989708","url":"https:\/\/crystalclassics.co.uk\/products\/dolomite-cast-with-duftite","provider":"Crystal Classics UK","version":"1.0","type":"link"}