{"product_id":"1-50-ct-yellow-sapphire-round-brilliant-heated-gia","title":"1.50 ct Natural Heated Yellow Sapphire – Round Cut | GIA Certified | Sri Lanka (Ceylon)","description":"\u003cp\u003eA natural 1.50 carat yellow sapphire in a round cut, from Sri Lanka (Ceylon), heat treated, and documented by GIA Sapphire Origin Report #1246017783, which gives Sri Lanka as its origin opinion and records a colour stability test on the stone with no change observed. That second finding matters: a colour stability test is not a standard line on a sapphire report, and here it was run with no change observed. At 1.50 carats the round cut carries a warm, strongly saturated golden colour, which suits an engagement ring, a pendant, or a collection.\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=\"\/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\"Two things on this report are the first I look for: a Sri Lanka origin opinion, and a colour stability test with no change observed. On a yellow, stability is worth testing rather than assuming — so we have it tested.\"\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 make this particular 1.50 ct yellow sapphire more distinctive than a typical stone of its type:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e A strong, medium-intense yellow with a saturated golden face-up appearance rather than a pale or washed-out tone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e At 1.50 carats, this stone is larger than the sub-1-carat yellow sapphires that dominate entry-level inventory, giving it more presence as a center stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heat treated, the standard and most common treatment for sapphire, disclosed directly on GIA Report #1246017783.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClarity:\u003c\/strong\u003e Loupe clean by our own assessment — no inclusions visible under 10x magnification. GIA coloured-stone reports carry no clarity grade, so this is our own observation and not a laboratory finding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e A GIA Sapphire Origin Report giving Sri Lanka as its origin opinion and recording a colour stability test with no change observed. GIA states geographic origin as an expert opinion rather than an absolute finding — we would rather quote it that way than overstate what a lab can determine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e A Ceylon origin opinion, a colour stability test with no change observed, a 1.50 ct size and a stone our own examination finds loupe clean are each ordinary enough alone. Together on one heated yellow sapphire they are less common than any of them suggests.\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 natural daylight when possible.\u003c\/strong\u003e Yellow sapphire can read differently under warm incandescent light versus daylight or LED, so daylight gives the truest sense of this stone's strong, saturated golden hue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the measurements before you choose a mounting.\u003c\/strong\u003e At 6.29-6.36 x 4.78 mm the stone falls between the standard 6.00 mm and 6.50 mm sizes and is 0.07 mm out of round, so a prong head will need fitting to it and a bezel should be made to its measurements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAsk what the paperwork actually covers.\u003c\/strong\u003e Origin, treatment and colour stability are three separate findings, and a report may carry one without the others. Ours carries all three; it does not grade clarity. Ask any seller to be equally specific.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis is a single stone.\u003c\/strong\u003e As a natural gem it is one of a kind, and this particular combination of colour, size, documentation and treatment cannot be reordered.\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=\"\/blogs\/information-pages-complete-guide\/yellow-sapphire-buyers-guide\"\u003eYellow Sapphire Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/information-pages-complete-guide\/what-is-an-unheated-sapphire\"\u003eUnheated Sapphire Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/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=\"\/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=\"\/blogs\/information-pages-complete-guide\/sapphire-buying-guide\"\u003eSapphire Buying Guide\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;\"\u003eCG8451\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;\"\u003e1.50 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 \/ Yellow 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 \/ 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;\"\u003e6.29-6.36 x 4.78 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;\"\u003eStrong Yellow \/ 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;\"\u003eSri Lanka (Ceylon) — GIA's origin opinion, per its standard disclaimer\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 — our own assessment; GIA coloured-stone reports carry no clarity grade\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 #1246017783\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 1.50 ct Round Yellow Sapphire?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eA round is the most forgiving shape to set and the easiest to match later, and at 1.50 carats it has real presence. The cut is what GIA calls a Modified Round Brilliant — a brilliant-cut crown over a step-cut pavilion — so it returns light like a brilliant while the stepped pavilion holds the golden colour rather than breaking it up. Like any yellow, it warms under incandescent light and cools toward daylight; both suit it.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eKey Benefits of this Natural Yellow Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGIA-Documented Origin and Treatment\u003c\/strong\u003e\u003cbr\u003eHeat treatment recorded, and Sri Lanka given as GIA's origin opinion, on Report #1246017783.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour Stability Test — No Change Observed\u003c\/strong\u003e\u003cbr\u003eGIA tested the stone for colour stability and observed no change under the test conditions. That is a test result, not a lifetime guarantee.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong Golden Colour\u003c\/strong\u003e\u003cbr\u003eA warm, saturated yellow that holds its depth in a ring or a pendant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Design Use\u003c\/strong\u003e\u003cbr\u003eSuited to a ring, a pendant, or a custom piece built around a single stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard-wearing\u003c\/strong\u003e\u003cbr\u003eCorundum at Mohs 9 — it resists the scratching that dulls a stone worn every day. Mohs measures scratch resistance, not resistance to a knock.\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\u003eSKU: CG8451\u003c\/li\u003e\n\u003cli\u003eCarat Weight: 1.50 carats\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Yellow Sapphire\u003c\/li\u003e\n\u003cli\u003eShape: Round\u003c\/li\u003e\n\u003cli\u003eCut Style: Modified Round Brilliant\u003c\/li\u003e\n\u003cli\u003eOrigin: Sri Lanka (Ceylon) — GIA's origin opinion on Report #1246017783\u003c\/li\u003e\n\u003cli\u003eTreatment: Heat Treated (GIA Report #1246017783)\u003c\/li\u003e\n\u003cli\u003eColor: Yellow\u003c\/li\u003e\n\u003cli\u003eTransparency: Transparent\u003c\/li\u003e\n\u003cli\u003eClarity: loupe clean — our own assessment, not a GIA grade\u003c\/li\u003e\n\u003cli\u003eColour Stability: test recorded on the GIA report; no colour change observed under the test conditions\u003c\/li\u003e\n\u003cli\u003eCertification: GIA Sapphire Origin Report #1246017783\u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eCare\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eClean with lukewarm water and mild soap using a soft brush, then rinse and dry with a soft cloth\u003c\/li\u003e\n\u003cli\u003eStore separately — at Mohs 9 this stone will scratch almost anything it is kept with\u003c\/li\u003e\n\u003cli\u003eRemove before heavy physical activity or manual work\u003c\/li\u003e\n\u003cli\u003eAvoid ultrasonic and steam cleaners — vibration and thermal shock can stress fine internal features in any gemstone\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhat's included with the gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGIA Sapphire Origin Report #1246017783\u003c\/li\u003e\n\u003cli\u003eGemstone packed in a gem sleeve.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis \u003cstrong\u003eyellow sapphire\u003c\/strong\u003e was selected for the strength of its colour and the completeness of its documentation — origin opinion, treatment and colour stability all recorded by GIA.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhat to Look at First\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree separate findings on one report:\u003c\/strong\u003e heat treatment recorded, Sri Lanka given as GIA's origin opinion, and a colour stability test with no change observed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe colour:\u003c\/strong\u003e a strong, warm yellow at medium-intense saturation — golden rather than lemon.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerfect for Custom Jewelry:\u003c\/strong\u003e Ideal centerpiece for unique designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeylon origin:\u003c\/strong\u003e given as GIA's expert opinion on Report #1246017783, not asserted by us.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis 1.50 ct round yellow sapphire is documented more thoroughly than most stones at its price — origin, treatment and colour stability, all on one GIA report.\u003c\/p\u003e\n","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":43344095838275,"sku":"CG8451","price":1200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/8451001.jpg?v=1780717525","url":"https:\/\/crescentgems.com\/products\/1-50-ct-yellow-sapphire-round-brilliant-heated-gia","provider":"Crescent Gems","version":"1.0","type":"link"}