{"product_id":"cassiterite-12","title":"CASSITERITE","description":"An ex-matrix, spectacular twinned Cassiterite crystal from the mines at Horn' Slavkov in the former Bohemia region of the Czech Republic.  The Cassiterite twin measures a huge 4.2 x 2.8 x 3.0 cm and is jet-black with glassy-smooth mirror-like faces and sharp, perfectly defined edges.  The re-entrant faces form a deep valley between the two crystals, with the outer faces displaying vertical furrows and striations.  There is a little bruising on some of the edges and one termination, but in all cases, this is minor and requires magnification to note such defects.  A conchoidal bruise has also been generated on one re-entrant face, although all such occurrences could be through natural damage while in-situ.  A choice and showy twinned Cassiterite from the Czech Republic.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781038252367,"sku":"CC19915","price":925.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC19915_547ba09e-5e1a-4d82-8201-6c02019d181f.jpg?v=1783977573","url":"https:\/\/crystalclassics.co.uk\/products\/cassiterite-12","provider":"Crystal Classics UK","version":"1.0","type":"link"}