{"product_id":"ullmannite-3","title":"ULLMANNITE","description":"Ullmannite is a rare nickel antimony sulphide which occurs quite widely around the world, but very rarely in large, well-formed crystals. This miniature specimen is not from the Type Locality, but is from the same region in Germany - Arnsberg, North Rhine-Westphalia. The Ullmannite forms an aggregate of gun-metal grey cubic crystals upon an aggregate of delicate needle-like Quartz crystals. The Ullmannite crystals reach 4 mm across, but there is some minor abrasion to the largest intergrown crystals. Many of the smaller crystals are well-formed, and cubo-octahedral in form, and there appears to be a single Tetrahedrite microcrystal, as a tarnished grey tetrahedral crystal, and a few tiny Chalcopyrite crystals. It is from the superb systematic collection assembled by the brothers Martin and Michael Günther (1951-2007 \u0026amp; 1956-2021).","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781193834831,"sku":"CC27617","price":296.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC27617_469ea96b-dd0c-4b32-b3fa-b12949e0fbe9.jpg?v=1783981010","url":"https:\/\/crystalclassics.co.uk\/products\/ullmannite-3","provider":"Crystal Classics UK","version":"1.0","type":"link"}