{"product_id":"millerite-with-calcite","title":"MILLERITE with CALCITE","description":"A rare and relatively rich old-time specimen of Millerite on Calcite from the St. Andreasberg mining district in the Harz Mountains of Lower Saxony, Germany.  The Millerite crystals are very tiny, probably never exceeding  1 mm in length and mainly much shorter.  They form a velvety druse covering a roughly 4 x 2 cm area of Calcite matrix, which in itself has an aged patina.  The Millerite, a nickel sulphide, forms metallic acicular micro hair-like crystals of dull bronze, often with a reddish-purple tarnish.  Greyish-cream hexagonal Calcite crystals to about 4 mm diameter are associated with the Millerite.  The specimen comes with two very old copperplate, handwritten labels.  A particularly rare example of Millerite from St. Andreasberg, a species very seldom encountered even when the mines were operational.  ","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57780940308815,"sku":"CC14855","price":555.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC14855_37b94976-4978-46bf-88bf-478c3cf6c9ae.jpg?v=1783970971","url":"https:\/\/crystalclassics.co.uk\/products\/millerite-with-calcite","provider":"Crystal Classics UK","version":"1.0","type":"link"}