{"product_id":"blue-cobalt-spinel-2-13ct-gfco","title":"Natural Blue Cobalt Spinel 2.13 ct – Cushion Cut, Untreated, GFCO Certified","description":"\u003cp data-start=\"112\" data-end=\"587\"\u003eThis natural blue cobalt spinel weighs 2.13 carats and displays a vivid blue color with exceptional saturation and attractive brilliance. The gemstone is expertly fashioned in a cushion cut measuring 7.92 × 6.22 × 5.39 mm, creating elegant proportions and lively light reflection that enhance its rich cobalt-blue appearance. Cobalt spinel is among the rarest and most desirable spinel varieties, highly valued for its intense electric-blue coloration and collector appeal.\u003c\/p\u003e\n\u003cp data-start=\"589\" data-end=\"1047\"\u003eOriginating from Tanzania, this gemstone remains completely untreated, with no heat treatment or enhancement, preserving its authentic natural beauty and rarity. The combination of brilliant crown faceting and step-cut pavilion provides outstanding brilliance and depth while maintaining the gemstone’s refined cushion shape. Certified by GFCO Gem Lab Switzerland, this spinel comes with independent verification of its natural origin and untreated status.\u003c\/p\u003e\n\u003cp data-start=\"1049\" data-end=\"1228\"\u003eIts rare cobalt-blue coloration, untreated nature, and Swiss laboratory certification make this spinel an exceptional choice for collectors and bespoke high-end jewelry creations.\u003c\/p\u003e","brand":"SOSNA Gems \u0026 Jewellery","offers":[{"title":"Default Title","offer_id":52827345715464,"sku":"2991465","price":32517.0,"currency_code":"CZK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/8398\/2600\/files\/natural-blue-cobalt-spinel-213-ct-cushion-cut-untreated-gfco-certified-8069193.jpg?v=1764729257","url":"https:\/\/sosnagems.com\/products\/blue-cobalt-spinel-2-13ct-gfco","provider":"SOSNA Gems","version":"1.0","type":"link"}