{"product_id":"cassiterite-with-quartz-and-zinnwaldite","title":"CASSITERITE with QUARTZ  and  \"Zinnwaldite\"","description":"For me, Cassiterite crystals always add a pang of excitement to a specimen, but perhaps I need to get out more often!  This most delicious miniature certainly does this for me, with four separate, well developed twinned glossy-black Cassiterite crystals embedded between chocolate-bronze books of hexagonal Zinnwaldite Mica crystals and small, 1 to 5 mm milky Quartz crystals.  The Cassiterite twins' range between 0.7 and 1 cm across and form perfectly defined butterfly twins with lustrous central re-entrant faces.  Zinnwaldite is now no longer classified as a species but is a convenient term for mica within the Siderophyllite and Polylithionite series.  These elegant Mica books attain 1.8 cm and provide an aesthetic foil to the metallic Cassiterite, a tin oxide.  A charming specimen from the famous tin deposit which spans the border between Germany (Saxony) and the Czech Republic (Bohemia).  The locality therefore carries the joint names C'novec\/Zinnwald near to Erzgebirge and Krusn' Hory.  ","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":46545169023151,"sku":"CC19692","price":700.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC19692.png?v=1770375416","url":"https:\/\/crystalclassics.com\/products\/cassiterite-with-quartz-and-zinnwaldite","provider":"Crystal Classics","version":"1.0","type":"link"}