{"product_id":"natural-cobalt-spinel-3-71-ct-in-cushion-cut-from-tanzania","title":"Natural Cobalt Spinel 3.71 Ct in Cushion Cut From Tanzania","description":"Natural Cobalt Spinel 3.71 Cts – Vivid Blue Gemstone, Rare Collector’s Stone\n\n⸻\nDescription\n\nMineral:\nSpinel – Cobalt-bearing variety\n\nDescription:\nThis 3.71 carat natural cobalt spinel radiates an intense, vivid blue hue—highly characteristic of true cobalt-bearing spinels. With excellent clarity and a brilliant cut, the gem offers top-tier saturation and fire. Unlike heat-treated or synthetic stones, this spinel’s vibrant color is naturally derived from cobalt, making it one of the rarest and most desirable varieties of spinel on the market. Perfect for collectors, custom designers, or investors seeking truly rare natural gems.\n\nWeight and Dimensions:\n\t•\tWeight: 3.71 carats \n\t•\tDimensions: 10.1x 7.5  x 5.6 mm\n\n\n\nLocality:\n              Tanzania.\n\n⸻\n\n\ncobalt spinel,\nblue spinel gem,\nnatural spinel,\nvivid blue gem,\nrare gemstone,\ncollector spinel,\nspinel crystal,\nloose gemstone,\nunheated spinel,\nsapphire alternative,\nfaceted spinel,\nrare blue gem,\ninvestment gem,","brand":"Faran Gems","offers":[{"title":"Default Title","offer_id":56600261296433,"sku":null,"price":1600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0923\/5516\/6513\/files\/506e9bce-il_fullxfull.8027753775_lers.jpg?v=1791040336","url":"https:\/\/farangems.com\/products\/natural-cobalt-spinel-3-71-ct-in-cushion-cut-from-tanzania","provider":"Faran Gems","version":"1.0","type":"link"}