{"product_id":"dioptase-18","title":"DIOPTASE","description":"This fine small cabinet specimen of deep emerald green Dioptase is from its type locality at Altyn-Tyube in Karagandy Province, Kazakhstan.  The Dioptase forms individual crystals of up to and just over 1 cm long while the majority of crystals are between 8 to 10 mm long.  They richly cover a 0.5 to 1 cm thick plate of crystalline Calcite, which varies from colourless and milky white to a light fawn grey.  A fair amount of the Calcite has a glossy satin lustre with an associated smooth glassy texture, I believe the result of acid etching to expose the Dioptase.  The Dioptase crystals are a complex mixture of transparent and translucent zones, often reflecting incident light which produces an internal sparkle or glow.\n","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781234237775,"sku":"CC30465","price":1110.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC30465_fc32797a-2b28-4899-80db-d36d2b260f21.jpg?v=1783983590","url":"https:\/\/crystalclassics.co.uk\/products\/dioptase-18","provider":"Crystal Classics UK","version":"1.0","type":"link"}