{"product_id":"5-39-ct-round-ceylon-blue-sapphire-unheated-gia","title":"5.39 ct Natural Unheated Blue Sapphire – Round Cut | GIA Certified | Ceylon (Sri Lanka)","description":"\u003cp\u003eA natural 5.39 carat blue sapphire in a round shape with Mixed Cut faceting (Modified Brilliant crown, Step Cut pavilion), from Sri Lanka (Ceylon), completely unheated and certified by GIA, Report #5231646038. At 5.39 carats, this is an exceptional size for any sapphire; combined with unheated status and GIA documentation, it represents a genuinely rare specification — unheated Ceylon sapphires above 5 carats rarely appear at market.\u003c\/p\u003e\n\n\u003cdiv style=\"border: 2px solid #5b2c6f; border-radius: 10px; padding: 20px 24px; margin: 28px 0; background-color: #f9f5fc;\"\u003e\n\u003ch2 style=\"margin-top: 0; margin-bottom: 12px; color: #4a235a;\"\u003eExpert Opinion\u003c\/h2\u003e\n\u003cp style=\"font-weight: 600; margin-bottom: 6px;\"\u003e\u003ca href=\"https:\/\/crescentgems.com\/pages\/ahmed-shareek-about-the-owner\" style=\"color: #4a235a; text-decoration: underline;\"\u003eAhmed Shareek\u003c\/a\u003e's Assessment\u003c\/p\u003e\n\u003cp style=\"font-style: italic; margin-bottom: 0;\"\u003e\"At 5.39 carats, this is one of the larger unheated Ceylon blue sapphires I've priced this year — GIA Report #5231646038 independently confirms both the natural color and the Sri Lankan origin, which is the combination that actually drives value here, not carat weight alone.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eRarity Analysis\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eBlue is sapphire's benchmark color — it is the most recognized and widely available hue in the species, so the case for this stone's rarity rests on treatment status, size, and documented origin rather than color scarcity.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Blue is the most common and commercially available sapphire color; rarity here is not a color story, it's what accompanies the color.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e The majority of blue sapphire sold globally is heat-treated to improve color and clarity — a stone independently confirmed unheated by GIA is a genuine minority within the blue sapphire market.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e Most commercial blue sapphire at retail is well under 2–3 carats; a clean, unheated stone at 5.39 carats sits well outside the typical size range, and availability narrows sharply as carat weight climbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Ceylon (Sri Lanka) is the historic reference origin for blue sapphire, and GIA's origin determination on this report adds a layer of confirmation many stones on the market never receive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e GIA Report #5231646038 independently verifies weight, dimensions, origin, and unheated treatment status — a level of confirmation absent from the large share of sapphires sold without lab paperwork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e No single factor above is unique in isolation, but the combination of unheated status, GIA-confirmed Ceylon origin, and a 5+ carat weight in one eye-clean stone is what actually narrows the available pool — and why a comparable stone rarely repeats at market.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eBuying Guidance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eA few practical points to weigh before purchasing this specific stone:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm the unheated claim independently.\u003c\/strong\u003e Don't take \"unheated\" on a seller's word alone — GIA Report #5231646038 is the independent verification here; ask any comparable stone's seller for the same lab-level confirmation, not just a verbal disclosure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvaluate the cut for light performance.\u003c\/strong\u003e This stone's Mixed Cut (Modified Brilliant crown, Step Cut pavilion) is faceted to maximize brightness in a round shape; when comparing round sapphires, check whether the pavilion is cut for brilliance or left shallow simply to preserve carat weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlan the mounting around the stone's actual dimensions.\u003c\/strong\u003e At 10.19 x 10.43 mm, this will read as a substantial center stone; round cuts are among the more forgiving shapes for prong protection, but confirm the setting is designed around this exact girdle outline before committing to a design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompare honestly against heated alternatives.\u003c\/strong\u003e Heated blue sapphire in similar size and face-up color is available at a fraction of the price; if unheated status and documentation matter to you, make sure any comparison stone carries the same GIA-level confirmation, not just a similar appearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the Try Before You Buy option\u003c\/strong\u003e if you would like to see the stone in hand before finalizing the purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eLearn More About This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/blue-sapphire-buyers-guide\"\u003eBlue Sapphire Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/what-is-an-unheated-sapphire\"\u003eUnheated Sapphire Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/what-is-a-gia-sapphire-report-and-how-do-you-read-one\"\u003eGIA Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/how-to-commission-custom-sapphire-ring\"\u003eCustom Ring Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/ceylon-sapphire-complete-guide\"\u003eCeylon Sapphire Origin Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/is-a-round-sapphire-good-for-an-engagement-ring-cut-color-and-what-to-know-before-you-buy\"\u003eIs a Round Sapphire Good for an Engagement Ring?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/sapphire-buying-guide\"\u003eSapphire Buying Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"border: 2px solid #5b2c6f; border-radius: 10px; padding: 20px 24px; margin: 28px 0; background-color: #f9f5fc;\"\u003e\n\u003ch2 style=\"margin-top: 0; margin-bottom: 14px; color: #4a235a;\"\u003eGemstone Data — At a Glance\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600; width: 42%;\"\u003eItem #\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eCG8262\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eCarat Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e5.39 ct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eSpecies \/ Variety\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eCorundum \/ Sapphire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eShape \/ Cut\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eRound, Mixed Cut (Modified Brilliant crown, Step Cut pavilion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e10.19 x 10.43 x 6.68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eColor \/ Intensity\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eBlue, Intense saturation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003ePhenomenon\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eTreatment\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eUnheated — GIA confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eOrigin\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eCeylon (Sri Lanka) — GIA confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eClarity\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eEye-clean — no visible inclusions under normal viewing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eTransparency\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eTransparent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eHardness\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e9 (Mohs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; font-weight: 600;\"\u003eCertification\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px;\"\u003eGIA Report #5231646038\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Choose this 5.39 ct Unheated Ceylon Blue Sapphire?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThe rarity of this stone comes from three combined factors: 5+ carats (size), unheated status (natural color), and GIA documentation (confirmed quality). At the 5+ carat level in unheated blue sapphire from Ceylon, each of these factors individually already narrows the available pool; together they represent a stone that will rarely appear at market again.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eKey Benefits of this Natural Blue Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnheated Ceylon Origin, GIA Documented\u003c\/strong\u003e\u003cbr\u003eNo thermal treatment. GIA confirms weight, dimensions, origin, and treatment status (Report #5231646038).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional 5+ Carat Size\u003c\/strong\u003e\u003cbr\u003eUnheated sapphires above 5 carats are genuinely rare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed Cut Faceting\u003c\/strong\u003e\u003cbr\u003eModified Brilliant crown with Step Cut pavilion maximizes brightness and fire.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInvestment-Grade Specification\u003c\/strong\u003e\u003cbr\u003eAll three premium criteria — size, unheated, certified — present in a single stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable for Daily Wear\u003c\/strong\u003e\u003cbr\u003eCorundum at Mohs 9, second only to diamond.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eCarat Weight: 5.39 Carats\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Blue Sapphire\u003c\/li\u003e\n\u003cli\u003eVariety: Sapphire\u003c\/li\u003e\n\u003cli\u003eShape: Round\u003c\/li\u003e\n\u003cli\u003eCut Style: Mixed Cut (Modified Brilliant crown, Step Cut pavilion)\u003c\/li\u003e\n\u003cli\u003eDimensions: 10.19 x 10.43 x 6.68 mm\u003c\/li\u003e\n\u003cli\u003eOrigin: Ceylon (Sri Lanka) — GIA confirmed\u003c\/li\u003e\n\u003cli\u003eTreatment: Unheated — GIA confirmed\u003c\/li\u003e\n\u003cli\u003eColor: Blue\u003c\/li\u003e\n\u003cli\u003eClarity: Eye-clean — no visible inclusions under normal viewing\u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003cli\u003eCertification: GIA Report #5231646038\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis 5.39 ct unheated Ceylon blue sapphire has been hand-selected as an exceptional specimen — the intersection of large size, natural treatment status, and independent documentation is the combination that defines the finest collector-grade sapphires.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eOne of a Kind\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThis is a single natural gemstone, not a manufactured or lab-created replica — no two sapphires form with identical color, clarity, and internal character. Once this stone sells, it's gone; there is no duplicate. What you see documented on the GIA report is the exact, individual stone you receive.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eCare\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eSapphire is exceptionally durable (Mohs 9), but a few habits keep it looking its best. Clean with warm water, mild soap, and a soft brush; avoid ultrasonic or steam cleaners if the stone is set alongside softer or treatment-sensitive materials. Store separately from other jewelry to prevent surface scratches to softer pieces, and remove the stone before swimming, exercising, or household chemical exposure. As an unheated stone, no thermal treatment stabilizes the color — normal wear is fine, but avoid sudden extreme temperature changes.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Customers Love This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGIA-Confirmed Everything:\u003c\/strong\u003e Size, origin, and treatment — all independently documented (Report #5231646038).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Size for This Variety:\u003c\/strong\u003e 5+ carat unheated Ceylon sapphire is a rare offering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVivid Blue:\u003c\/strong\u003e Intense, even saturation across the full face of the stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Source:\u003c\/strong\u003e Direct from Ceylon, GIA-confirmed, treatment disclosed honestly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eOwning this 5.39 ct unheated GIA Ceylon blue sapphire means acquiring a stone that is exceptional across every criterion that defines sapphire rarity.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003ePerfect Uses for this 5.39 ct Blue Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eInvestment-grade gemstone collection\u003c\/li\u003e\n\u003cli\u003eStatement pendant center stone\u003c\/li\u003e\n\u003cli\u003eCollectors of unheated Ceylon sapphires with GIA documentation\u003c\/li\u003e\n\u003cli\u003eHeirloom-quality custom commission\u003c\/li\u003e\n\u003cli\u003eMuseum-quality private collection piece\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":42665947136067,"sku":"CG8262","price":48509.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/image-2.jpg?v=1785416885","url":"https:\/\/crescentgems.com\/en-ca\/products\/5-39-ct-round-ceylon-blue-sapphire-unheated-gia","provider":"Crescent Gems","version":"1.0","type":"link"}