{"product_id":"calcite-on-conichalcite","title":"CALCITE on CONICHALCITE","description":"A classic specimen of beautiful rhombohedral, sharp-edged crystals of Calcite set against a carpet of rich leaf-green Conichalcite from the Tsumeb Mine in the Oshikoto Region of Namibia. The Calcite crystals have developed as equant (equal-sided) rhombs and as flattened, more tabular rhombs. Although essentially colourless, all crystals are tinted a greyish-cream, especially towards their centres. The prism faces are glassy-smooth and mirror-bright and at certain angles give a play of iridescent interference colours from both their surface and internally.  The Calcite rhombs also catch the light giving superb internal reflections, making them appear backlit. The solid, iron-stained Dolomite matrix naturally positions the display face at one of either two angles, according to which side of the base the specimen rests on. The Conichalcite forms a solid covering of sub-mm botryoidal crystal aggregates which provide a velvety backdrop to the Calcite. A Tsumeb classic. ","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":46545087627439,"sku":"CC16579","price":12500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC16579.png?v=1770369890","url":"https:\/\/crystalclassics.com\/products\/calcite-on-conichalcite","provider":"Crystal Classics","version":"1.0","type":"link"}