{"product_id":"native-copper-33","title":"NATIVE COPPER","description":"This large cabinet-sized slightly branching Native Copper is from the famous Central mine in Keweenaw Co., Michigan - one of the all-time classic locations for crystallized Native Copper. Opened in 1854, Central mine holds the distinction of being the first mine in the district to turn a profit in its first year. It continued operating until 1898, producing a total of 51 million lbs (23,000 tons) of refined copper metal. This specimen has a rich bright metallic copper colour and quite thick branches. A fine and very displayable large crystallized Native Copper.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":46545292066991,"sku":"CC21159","price":3500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC21159.png?v=1770378543","url":"https:\/\/crystalclassics.com\/products\/native-copper-33","provider":"Crystal Classics","version":"1.0","type":"link"}