{"product_id":"natural-blue-sapphire-3-16ct-cushion-cut-loose-gemstone","title":"Natural Blue Sapphire 3.16 Ct Cushion Cut Loose Gemstone | Heat Treated September Birthstone","description":"\u003carticle\u003e\n\n\u003cp\u003e\u003cstrong\u003eNatural Blue Sapphire weighing 3.16 carats, featuring a cushion cut, blue colour and heat treatment. Offered as a loose gemstone for custom jewellery and supplied with certification from an authorised gemologist.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis natural blue sapphire weighs 3.16 carats and displays an attractive blue colour. Its cushion cut combines soft corners with excellent depth, making it suitable for custom engagement rings, pendants, and bespoke jewellery designs. Sold as a loose gemstone, it provides flexibility for buyers seeking a natural sapphire for jewellery projects or gemstone collections.\u003c\/p\u003e\n\n\u003cdiv class=\"ai-search-summary\"\u003e\n\u003ch3\u003eQuick Summary\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGemstone:\u003c\/strong\u003e Natural Blue Sapphire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.16 Carat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Cushion Cut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Blue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heat Treated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClarity:\u003c\/strong\u003e VS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBirthstone:\u003c\/strong\u003e September\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eBlue sapphire is a variety of natural corundum valued for its durability, colour stability, and long-standing use in fine jewellery. With a hardness of 9 on the Mohs scale, sapphire is suitable for jewellery intended for regular wear when professionally set.\u003c\/p\u003e\n\n\u003cp\u003eAs the birthstone for September, blue sapphire is traditionally associated with wisdom, sincerity, and loyalty. Its enduring popularity makes it a recognised choice for engagement rings, personalised jewellery, and meaningful gifts.\u003c\/p\u003e\n\n\u003ch3\u003eGemstone Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentification:\u003c\/strong\u003e Natural Sapphire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecies:\u003c\/strong\u003e Natural Corundum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariety:\u003c\/strong\u003e Blue Sapphire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape \/ Cut:\u003c\/strong\u003e Cushion Cut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClarity:\u003c\/strong\u003e VS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.16 Carat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Blue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 7.40 × 9.40 × 5.40 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heat Treated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBirthstone:\u003c\/strong\u003e September\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCertification \u0026amp; Authenticity\u003c\/h3\u003e\n\n\u003cp\u003eThis sapphire includes a certificate issued by an authorised gemologist confirming its identity as a natural sapphire and disclosing treatment information.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSeller Notes:\u003c\/strong\u003e Crystal and dust inclusions are visible under magnification. These characteristics are commonly found in natural sapphires and are consistent with natural gemstone formation.\u003c\/p\u003e\n\n\u003ch3\u003eJewellery Applications\u003c\/h3\u003e\n\n\u003cp\u003eThis gemstone is sold loose and is not supplied as a finished jewellery item. Suitable applications include:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eCustom Engagement Rings\u003c\/li\u003e\n\u003cli\u003eWedding Band Centre Stones\u003c\/li\u003e\n\u003cli\u003ePendants and Necklaces\u003c\/li\u003e\n\u003cli\u003eSeptember Birthstone Jewellery\u003c\/li\u003e\n\u003cli\u003eCustom Fine Jewellery Projects\u003c\/li\u003e\n\u003cli\u003eGemstone Collections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eCustom jewellery services are available using gold, rose gold, white gold, silver, and platinum settings.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This Sapphire?\u003c\/h3\u003e\n\n\u003cp\u003eNatural blue sapphires are valued for their durability, timeless appearance, and versatility. Cushion-cut sapphires offer a balance of brilliance and depth, making them suitable for both traditional and contemporary jewellery styles.\u003c\/p\u003e\n\n\u003ch3\u003eExplore Related Collections\u003c\/h3\u003e\n\n\u003cp\u003e\nBrowse related selections and educational resources:\n\u003ca href=\"https:\/\/www.nashgems.com\/collections\/blue-sapphire-gemstones\"\u003eBlue Sapphire Collection\u003c\/a\u003e |\n\u003ca href=\"https:\/\/www.nashgems.com\/collections\"\u003eNatural Sapphire Collection\u003c\/a\u003e |\n\u003ca href=\"https:\/\/www.nashgems.com\/collections\/all\"\u003eAll Gemstones\u003c\/a\u003e |\n\u003ca href=\"https:\/\/www.nashgems.com\/collections\/sapphire-gemstone-jewelry-rings\"\u003eReady-to-Wear Jewellery\u003c\/a\u003e |\n\u003ca href=\"https:\/\/www.nashgems.com\/pages\/contact\"\u003eContact Us\u003c\/a\u003e |\n\u003ca href=\"https:\/\/www.nashgems.com\/blogs\/gemstone-articles\"\u003eGemstone Education Articles\u003c\/a\u003e\n\u003c\/p\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\n\u003cp\u003eWorldwide shipping is available with tracking and insurance. Delivery times vary by destination. Buyers are responsible for applicable customs duties or import taxes. Returns are accepted according to our published return policy.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eIs this a natural blue sapphire?\u003c\/h4\u003e\n\u003cp\u003eYes. This gemstone is identified as a natural blue sapphire from the corundum family.\u003c\/p\u003e\n\n\u003ch4\u003eHas this sapphire been treated?\u003c\/h4\u003e\n\u003cp\u003eYes. This sapphire has undergone heat treatment, which is disclosed in the specifications.\u003c\/p\u003e\n\n\u003ch4\u003eDoes the gemstone include certification?\u003c\/h4\u003e\n\u003cp\u003eYes. A certificate from an authorised gemologist is included.\u003c\/p\u003e\n\n\u003ch4\u003eCan this sapphire be used in an engagement ring?\u003c\/h4\u003e\n\u003cp\u003eYes. Its durability and cushion cut make it suitable for custom engagement ring designs.\u003c\/p\u003e\n\n\u003ch4\u003eIs this sold as a loose gemstone?\u003c\/h4\u003e\n\u003cp\u003eYes. The sapphire is sold loose and is not supplied as a finished jewellery item.\u003c\/p\u003e\n\n\u003c\/article\u003e\n","brand":"NASHGEMS","offers":[{"title":"Default Title","offer_id":44727790797028,"sku":"3.16 crt blue S R66","price":1653.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/9569\/9940\/files\/blue_stone_jewelry_11.jpg?v=1745835362","url":"https:\/\/www.nashgems.com\/products\/natural-blue-sapphire-3-16ct-cushion-cut-loose-gemstone","provider":"NASHGEMS","version":"1.0","type":"link"}