{"product_id":"smithsonite-on-tennantite","title":"SMITHSONITE on TENNANTITE","description":"Unique to Tsumeb mine is the association of finely crystallized Smithsonite encapsulating earlier tetrahedral Tennantite crystals. This small cabinet-sized specimens displays this combination very well with the tiny glossy colourless Smithsonite crystals looking grey due to the colour of the underlying Tennantite crystals which, individually reaching up to 3 cm across, form a very well-crystallized aggregate. With the splitting up of the Tennantite and Tetrahedrite groups of minerals most Tsumeb crystals are now considered to be Tennantite-(Zn) and with alteration to Smithsonite (zinc carbonate) one could expect that the Tennantite is indeed zinc-rich. A quite impressive display of this important stage of oxidation from Tsumeb mine.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":58635998036303,"sku":"CC36783","price":1774.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC36783_5bb37e26-b548-4b45-b557-b1eb197f49b5.jpg?v=1788274895","url":"https:\/\/crystalclassics.co.uk\/products\/smithsonite-on-tennantite","provider":"Crystal Classics UK","version":"1.0","type":"link"}