{"product_id":"calcite-93","title":"CALCITE","description":"A magnificent six-sided scalenohedral Calcite crystal from Millclose mine, South Darley in Derbyshire, a once highly productive lead and zinc mine close to the town of Matlock.  This single, off-matrix specimen grades from opaque milky-white Calcite at its base to an almost colourless and transparent sharp termination.  Six mirror-smooth, alternately broad and narrow faces have a glassy bright lustre and the specimen stands well, leaning at a tilted angle.  Internal fractures provide a most attractive criss-cross pattern giving a play of iridescent colours.  Internal Calcite phantoms are also picked out by subtle planes of finely disseminated black sulphides.  The base is overgrown with recrystallised Calcite forming small blocky crystals.  A superb Calcite crystal from one of Derbyshire's larger and most well-known mines.  It is accompanied with a typed label which notes this specimen was collected on 14th July 1937.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":46545096769711,"sku":"CC17231","price":1500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC17231.png?v=1770370391","url":"https:\/\/crystalclassics.com\/products\/calcite-93","provider":"Crystal Classics","version":"1.0","type":"link"}