{"product_id":"green-round-ceylon-sapphire-29","title":"1.80 ct Natural Heated Teal Sapphire – Round Cut | GIA Certified | USA (Montana)","description":"\u003cp\u003eA natural 1.80 ct Round Teal Sapphire from Montana, USA, heat treated, GIA Report #5241017781. Teal sapphire — a bluish-green hue prized in the trade and closely associated with Montana's signature sapphire deposits — is unusual in round cut, since most material this color is cut oval or cushion to maximize weight retention. At 1.80 carats, this is larger than the typical calibrated round, making it a viable single center stone rather than a side-stone or accent piece.\u003c\/p\u003e\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\"This 1.80 ct round Teal Sapphire is a genuinely uncommon cut-color pairing — Montana bluish-green material this size is almost always cut oval or cushion to preserve weight, so a well-proportioned round of this carat weight stands out. GIA Report #5241017781 confirms both the USA (Montana) origin and the heat treatment, so there's no guesswork about what you're buying.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eRarity Analysis\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eA few factors combine to make this specific stone harder to replace than a typical teal sapphire:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Teal (bluish-green) at Medium Intense saturation is Montana's signature hue, a color closely tied to that single locality rather than widely produced elsewhere.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e At 1.80 ct, this stone is larger than the typical calibrated round teal sapphire, which is usually cut smaller to conserve rough.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heat treated, a standard and disclosed treatment for sapphire — confirmed on the GIA report rather than left to guesswork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClarity:\u003c\/strong\u003e Graded Loupe Clean, meaning no visible inclusions even under magnification — a clean grade that is not a given in this color.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e GIA Report #5241017781 verifies weight, shape, dimensions, color, treatment, and USA (Montana) origin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e A GIA-documented, above-average-size round teal sapphire from a single recognized locality is a narrower category than \"teal sapphire\" alone, and stones matching all of these points at once are not common in the round shape.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eBuying Guidance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eA few practical points to weigh before purchasing this specific stone:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eView it in mixed lighting.\u003c\/strong\u003e Teal sapphire's blue-green color can shift subtly between daylight and indoor lighting, so viewing under more than one light source will give the truest sense of the hue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the fit for your setting.\u003c\/strong\u003e At 6.32–6.42 x 5.49 mm, this round stone will sit within standard round solitaire and halo prong dimensions, so confirm your setting's mounting size against these measurements before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm the GIA report matches the stone.\u003c\/strong\u003e When comparison-shopping Montana teal sapphires, verify that the seller's GIA report number, weight, and origin conclusion actually match the physical stone being offered.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeigh the size against availability.\u003c\/strong\u003e As noted in the Rarity Analysis, round teal sapphires at 1.80 ct with Montana origin documentation are not routinely available, so sourcing a close match later isn't guaranteed.\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\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eLearn More About This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/teal-sapphire-buyers-guide\"\u003eTeal 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\/sapphire-buying-guide\"\u003eSapphire Buying Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/how-cut-affects-sapphire\"\u003eHow Cut Affects a Sapphire\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/montana-sapphire-vs-ceylon-sapphire\"\u003eMontana Sapphire vs. Ceylon Sapphire\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\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;\"\u003eCG8279\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;\"\u003e1.80 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;\"\u003eNatural Teal Sapphire (Corundum)\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 \/ Modified Round Brilliant\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;\"\u003e6.32 - 6.42 x 5.49 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;\"\u003eTeal (Bluish Green), Medium Intense\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;\"\u003eHeat Treated\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;\"\u003eUSA (Montana)\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;\"\u003eLoupe Clean — no visible inclusions even under magnification\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 #5241017781\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Choose this 1.80 ct Round Teal Sapphire?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eTeal sapphire offers the durability of corundum (Mohs 9) in a color that reads as a distinctive blend of blue and green — without emerald's fragility, heavy oiling, and clarity compromises. Montana is one of the most recognized sources for this specific bluish-green color signature, and GIA Report #5241017781 confirms both the USA (Montana) origin and heat treatment. A round cut at this size is genuinely uncommon: the shape sacrifices weight but produces maximum brilliance, and designers working with round settings who want a teal stone will find this format directly usable without recutting.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eKey Benefits of this Natural Teal Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound Cut in a Rare Color\u003c\/strong\u003e\u003cbr\u003eRound teal sapphire at this size is uncommon — most teal\/green material is cut oval or cushion for weight efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Brilliance\u003c\/strong\u003e\u003cbr\u003eRound brilliant cuts return more light than any other shape, making the teal color vivid and lively.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Emerald Alternative\u003c\/strong\u003e\u003cbr\u003eMohs 9 — significantly more robust than emerald for ring use, no oil treatment required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigner-Ready Format\u003c\/strong\u003e\u003cbr\u003eRound cut is the most common engagement ring setting format, usable without custom fabrication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMontana Provenance\u003c\/strong\u003e\u003cbr\u003eGIA Report #5241017781 confirms USA (Montana) origin, one of the most sought-after sources for teal sapphire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCarat Weight: 1.80 Carats\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Teal Sapphire\u003c\/li\u003e\n\u003cli\u003eShape: Round\u003c\/li\u003e\n\u003cli\u003eCut Style: Modified Round Brilliant\u003c\/li\u003e\n\u003cli\u003eOrigin: USA (Montana)\u003c\/li\u003e\n\u003cli\u003eTreatment: Heat Treated\u003c\/li\u003e\n\u003cli\u003eColor: Teal (Bluish Green)\u003c\/li\u003e\n\u003cli\u003eTransparency: Transparent\u003c\/li\u003e\n\u003cli\u003eClarity: Loupe Clean — no visible inclusions even under magnification\u003c\/li\u003e\n\u003cli\u003eCertification: GIA Report #5241017781\u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis 1.80 ct Round Teal Sapphire has been hand-selected for the vividness of its bluish-green color and the quality of its round cut — the combination that makes this format directly usable in standard solitaire and halo settings.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Customers Love This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnusual Round Format:\u003c\/strong\u003e Round teal sapphire at this size is genuinely uncommon.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrilliant Cut Performance:\u003c\/strong\u003e Maximum light return — vivid and lively teal color face-up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical Durability:\u003c\/strong\u003e Sapphire's Mohs 9 hardness without emerald's fragility concerns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMontana Origin:\u003c\/strong\u003e GIA Report #5241017781 confirms USA (Montana) provenance and heat treatment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOwning this 1.80 ct round teal sapphire means choosing a stone that combines an unusual format with practical utility and documented Montana provenance — a teal center stone that fits any round-setting design, backed by GIA Report #5241017781.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003ePerfect Uses for this 1.80 ct Round Teal Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSolitaire engagement ring — teal alternative to diamond\u003c\/li\u003e\n\u003cli\u003eHalo ring center stone\u003c\/li\u003e\n\u003cli\u003eCustom pendant in round bezel setting\u003c\/li\u003e\n\u003cli\u003eCollectors of round-cut Montana corundum\u003c\/li\u003e\n\u003cli\u003eThree-stone ring center stone\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":42665946087491,"sku":"CG8279","price":8052.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/stone_CG8279_image-1.jpg?v=1778308924","url":"https:\/\/crescentgems.com\/en-gcc\/products\/green-round-ceylon-sapphire-29","provider":"Crescent Gems","version":"1.0","type":"link"}