{"product_id":"calcite-with-native-copper-inclusions","title":"CALCITE with NATIVE COPPER Inclusions","description":"Native Copper included within Calcite is one of the most sought after mineral combinations from the copper mining area of Houghton County, Michigan, USA; also referred to as the Upper Peninsula, or U.P .  This specimen is from the Franklin mine which originally closed in 1880, but then was later absorbed into the Quincy Mining Company.   A translucent to gemmy terminated, multi-faced Calcite crystal stands upright measuring to 4.2 cm tall.  It is heavily included by sheets of copper-red Native Copper, giving the Calcite a pinkish hue.  The matrix is a reddish volcanic rock overgrown by colourless-white Quartz and Calcite with inclusions and free grown Native Copper.  It is also included by green Pumpellyite and rare yellow micro-crystals of Epidote.  A classic Upper Michigan copper mining area specimen and comes with its own purpose made base. ","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":46540816384175,"sku":"CC5461","price":6500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC5461.png?v=1770205178","url":"https:\/\/crystalclassics.com\/products\/calcite-with-native-copper-inclusions","provider":"Crystal Classics","version":"1.0","type":"link"}