{"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":57781472952655,"sku":"CC5461","price":4811.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC5461_8a055499-620e-4312-becd-523f8ae33055.jpg?v=1783990232","url":"https:\/\/crystalclassics.co.uk\/products\/calcite-with-native-copper-inclusions","provider":"Crystal Classics UK","version":"1.0","type":"link"}