{"product_id":"bornite-11","title":"BORNITE","description":"Several small aggregates of intergrown dark grey pseudorhombic Bornite crystals are perched upon a miniature-sized piece of altered copper sulphide bearing veinstone from the famous Carn Brea mine near Redruth in Cornwall. It seems remarkable that a copper iron sulphide species such as Bornite is so rarely seen in crystals, and that many of the best examples are those found in a small number of Cornish copper mines during the 19th and early 20th centuries. The largest crystal on this piece reaches 8 mm in length and all of the crystals are really well-formed. The oxidized matrix has a few small age-related cracks and has been stabilized. It is from the superb systematic collection assembled by the brothers Martin and Michael Günther (1951-2007 \u0026amp; 1956-2021).","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":46792441659567,"sku":"CC29129","price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC29129.png?v=1784022612","url":"https:\/\/crystalclassics.com\/products\/bornite-11","provider":"Crystal Classics","version":"1.0","type":"link"}