{"product_id":"hausmannite-on-andradite","title":"HAUSMANNITE   on ANDRADITE","description":"Despite Hausmannite’s deceptively simple chemical formula, it is a complex manganese oxide containing both divalent (Mn2+) and trivalent (Mn3+) manganese. This spectacular example is from the N'Chwaning Mines at Kuruman in Northern Cape Province, South Africa, one of the mines within the Kalahari Manganese Field. Semi-lustrous, black Hausmannite crystals cover at least fifty percent of the display face of a rich, salmon pink Andradite garnet matrix, in the form of sub-millimetre crystals giving the matrix a fine-granular texture. The Hausmannite forms as stepped octahedral crystals built from small, individual tetrahedral prisms, each with a sub-metallic lustre and rough, pitted surface texture. With the magnificent Hausmannite crystals contrasting nicely against the orangey pink Andradite, this makes a superb cabinet specimen of museum quality.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781259764047,"sku":"CC35060","price":3701.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC35060_3faa3b43-928a-46a4-a77f-2f2086e341ad.jpg?v=1783984349","url":"https:\/\/crystalclassics.co.uk\/products\/hausmannite-on-andradite","provider":"Crystal Classics UK","version":"1.0","type":"link"}