{"product_id":"gratonite-1","title":"GRATONITE","description":"A superbly crystallised thumbnail of the rare lead-arsenic sulphosalt Gratonite from its type locality at the Excelsior mine at Cerro de Pasco, in western central Peru.  A radiating cluster of trigonal terminated Gratonite crystals sit on a fine-grained metallic matrix of massive Gratonite together with a small sliver of host rock.  The Gratonite is a darkish, silver lead-grey with some crystal faces displaying a light coffee-brown patina.  This s a lovely specimen of very well formed Gratonite crystals from the Excelsior mine in Peru and a relatively rare species for the systematic collector.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781122171215,"sku":"CC20202","price":703.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC20202_ffc9125c-554b-4ca1-ad44-d2422081b88f.jpg?v=1783977881","url":"https:\/\/crystalclassics.co.uk\/products\/gratonite-1","provider":"Crystal Classics UK","version":"1.0","type":"link"}