{"product_id":"cassiterite-14","title":"CASSITERITE","description":"This beautifully aesthetic cluster of superb Cassiterite crystals will make a real show-stopper for many good collections.  The ex-matrix, intergrown large Cassiterite crystals measure up to 3 cm across, with one main twinned crystal taking centre stage.  Most crystal faces are mirror-smooth, but some display striations normal to their twinning axis.  The Cassiterite is mainly coal-black and opaque, but near-surface features show internal planes of translucent burnt orange.  Hidden beneath the base are Quartz grains of medium to coarse grain size (Wentworth scale) cemented by a yellowish fine grained mineral, probably Muscovite.  A choice Cassiterite from Horn' Slavkov.  ","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781123416399,"sku":"CC20235","price":1110.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC20235.jpg?v=1783977929","url":"https:\/\/crystalclassics.co.uk\/products\/cassiterite-14","provider":"Crystal Classics UK","version":"1.0","type":"link"}