{"product_id":"calcite-with-pyrolusite","title":"CALCITE with PYROLUSITE","description":"Sharp, sugary-white Calcite forms an open cluster of rhombohedral crystals of varying size, ranging from just a few millimetres to 2.2 cm on edge.  From the Tsumeb mine in Namibia, the crystals have a sucrosic texture which give a matt, non-reflective lustre.  The purity of the snow-white Calcite is interrupted on occasional crystals by blackened areas smudged with micro-crystalline Pyrolusite, manganese dioxide.  Despite being common throughout all levels at Tsumeb, Pyrolusite is a species not readily recognised or recorded on specimens, so making this a nice addition to a Tsumeb suite.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57780953579855,"sku":"CC15571","price":296.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC15571_6260e676-c96c-441e-8e49-1ba443cce6c5.jpg?v=1783971936","url":"https:\/\/crystalclassics.co.uk\/products\/calcite-with-pyrolusite","provider":"Crystal Classics UK","version":"1.0","type":"link"}