{"product_id":"conichalcite-with-calcite","title":"CONICHALCITE   with CALCITE","description":"The vivid, almost acid-green colour of this specimen is really eye-catching. This is Conichalcite, a rare calcium copper arsenate hydroxide species which forms a series with Duftite (where lead replaces calcium). Both species are well-known at Tsumeb mine and it is possible that both are present on this specimen, as cross-sections through the vivid green velvety microbotryoidal crusts, exposed on the edges of the specimen, show distinct colour banding when viewed under magnification. A later, partial overgrowth of cream coloured rhombic Calcite crystals adds to its attraction. Ex Kessler Collection.","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":57781474099535,"sku":"CC55886","price":296.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/3748\/2063\/files\/CC55886_4b4d37e2-c978-4f5b-8ef2-0f4c209e6cc9.jpg?v=1783990325","url":"https:\/\/crystalclassics.co.uk\/products\/conichalcite-with-calcite","provider":"Crystal Classics UK","version":"1.0","type":"link"}