{"product_id":"quartz-and-sphalerite","title":"QUARTZ and SPHALERITE","description":"Excellent, well-formed crystals of lustrous black Sphalerite with gemmy colourless Quartz crystals, from Gyudyurska mine in Bulgaria.  Sharply developed tetrahedral crystals of Sphalerite measure to 2.1 cm; all with a brilliant metallic lustre and gently stepped triangular growth patterns that gradually diminish towards their centres.  This is a very pleasing specimen of such a common mineral, probably showing off Sphalerite to its absolute best advantage.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781493367119,"sku":"CC6798","price":962.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC6798.jpg?v=1783991445","url":"https:\/\/crystalclassics.co.uk\/products\/quartz-and-sphalerite","provider":"Crystal Classics UK","version":"1.0","type":"link"}