{"product_id":"cassiterite-9","title":"CASSITERITE","description":"A number of mines surround the historic mining town of Horn' Slavkov in the Karlovy Vary Region of Bohemia in the Czech Republic.  Simplistically, these can be divided into a uranium ore deposit and a tin-tungsten deposit, yet the overall mineralogy is complex and of the almost one hundred known species, many are rare minerals.  This specimen is however something very familiar, Cassiterite, and is a superb example of a perfectly twinned crystal.  An ex. matrix miniature, the Cassiterite is opaque jet-black with a highly reflective metallic lustre, over which are sparsely scattered granular Quartz grains of lemon-tinged cream.  The Cassiterite twin is bisected by deep re-entrant faces all of which display the twinning crystallography magnificently.  This specimen comes with the previous German collector's card label who accessioned it in 1984.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781029667151,"sku":"CC19717","price":1110.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC19717_061da073-4537-4cf6-9ad3-a56c5ba15fca.jpg?v=1783977048","url":"https:\/\/crystalclassics.co.uk\/products\/cassiterite-9","provider":"Crystal Classics UK","version":"1.0","type":"link"}