{"product_id":"willemite-var-troostite","title":"WILLEMITE var. TROOSTITE","description":"The zinc silicate Willemite forms multiple parallel stalactites of earthy deep carmine red to brownish brick red overgrown by delicate micro-acicular crystals of colourless to silvery white Willemite of the variety Troostite.  Troostite is a manganese-bearing variety of Willemite.  The earthy textured stalactites are likely a mixture of Willemite and Goethite with the longest of the group measuring 5 cm.  The rich coating of Troostite in the form of fine acicular crystals gives a play of colours in shades of silver, grey and white due to transmitted light and the underlying dark stalactites.  An unusual and fascinating miniature from Tsumeb with a M. Zinn Collection label.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57780960985423,"sku":"CC15780","price":1850.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC15780_ce393b87-a559-4a1f-8173-5a8aaeacd783.jpg?v=1783972185","url":"https:\/\/crystalclassics.co.uk\/products\/willemite-var-troostite","provider":"Crystal Classics UK","version":"1.0","type":"link"}