{"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":46545176101039,"sku":"CC20202","price":950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC20202.png?v=1770375868","url":"https:\/\/crystalclassics.com\/products\/gratonite-1","provider":"Crystal Classics","version":"1.0","type":"link"}