{"product_id":"0-68-ct-round-5mm-white-sapphire-colorless","title":"0.68 ct Natural Heated White Sapphire – Round (calibrated 5mm) Cut","description":"\u003cp\u003eA natural 0.68 carat white sapphire in a 5mm round calibrated cut, colorless, heat treated. Calibrated 5mm round white sapphire is a standard designer and jeweler format — the 5mm diameter fits the most common standard solitaire and bezel settings available in the commercial setting market, making this a drop-in stone for any 5mm round setting without custom fabrication. Colorless white sapphire at Mohs 9 is the most durable colorless gemstone alternative to diamond.\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\"A 5mm round is the single most requested calibrated size we carry — at 0.68 ct, loupe-clean, and cut to true 5mm diameter, this stone slots into virtually any standard round setting on the market without a bench adjustment.\"\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\u003cp\u003eWhite (colorless) sapphire is a small fraction of overall corundum production, and calibrated commercial-grade round goods represent a narrow, standardized slice of that supply.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e True colorless corundum is uncommon in nature; most commercial white sapphire, including this stone, is heat-treated to reach and stabilize full colorlessness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e At 0.68 ct in a 5mm diameter, this stone matches the single most common calibrated round specification in the commercial setting market — it is common by design, not by chance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Heat treatment is the standard, disclosed practice for commercial white sapphire; this stone's treatment is typical for the category and openly stated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClarity:\u003c\/strong\u003e Loupe-clean clarity — no eye-visible inclusions — is a meaningfully higher clarity grade than much of the calibrated white sapphire sold at this size and price point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e This is a calibrated commercial stone sold without a third-party gemological report; its specifications reflect the seller's own assessment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e Exact 5mm calibration plus loupe-clean clarity is what makes this a reliable drop-in diamond alternative — the combination is what commercial buyers are paying for, not the color or size alone.\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\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 under multiple light sources.\u003c\/strong\u003e Colorless stones can pick up faint warmth or coolness depending on the light; check the stone under daylight-equivalent and warm indoor lighting before committing to a setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm your setting takes a true 5mm round.\u003c\/strong\u003e This stone is calibrated to that exact diameter — verify your mounting or CAD file is specified for 5mm, since nominal \"5mm\" listings can vary slightly between suppliers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAsk about treatment disclosure when comparison shopping.\u003c\/strong\u003e Heat treatment is standard for white sapphire, but not every seller states it plainly — this listing does.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeigh calibrated precision against one-of-a-kind pricing.\u003c\/strong\u003e Calibrated stones like this one are priced for manufacturing consistency rather than rarity premiums, which is part of why the per-carat cost is accessible relative to certified fancy-color sapphires.\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\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/white-sapphire-buyers-guide\"\u003eWhite 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-vs-diamond-engagement-rings-the-real-differences-and-how-to-choose-the-right-sapphire\"\u003eSapphire vs. Diamond Engagement Rings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/sapphire-vs-moissanite-vs-lab-diamond\"\u003eSapphire vs. Moissanite vs. Lab Diamond\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;\"\u003eCG8307\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;\"\u003e0.68 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 \/ White 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, Portuguese cut (calibrated 5mm)\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;\"\u003e5 x 5 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;\"\u003eColorless\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)\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\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;\"\u003eNo third-party lab report on file — report number not listed in product data\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 0.68 ct Calibrated 5mm Round White Sapphire?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eCalibrated 5mm round sapphire is the designer's and jeweler's format — it eliminates the sizing and setting accommodation steps that uncalibrated stones require. If you are working with a standard 5mm solitaire, bezel, or prong setting, this stone drops in directly. Colorless and heat treated, the stone is honest about its treatment and delivers consistent colorlessness across the face.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eKey Benefits of this Natural White Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrated 5mm Standard\u003c\/strong\u003e\u003cbr\u003eExact 5mm diameter — fits standard round settings without sizing adjustment or custom fabrication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColorless Diamond Alternative\u003c\/strong\u003e\u003cbr\u003eNatural colorless corundum at Mohs 9 — the most durable colorless gem other than diamond.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigner-Ready Format\u003c\/strong\u003e\u003cbr\u003eCalibrated round is the most versatile format for jewelry designers and setters working with standard components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMohs 9 Hardness\u003c\/strong\u003e\u003cbr\u003eAppropriate for daily wear in any setting type without special care requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Colorlessness\u003c\/strong\u003e\u003cbr\u003eHeat treated to maximize colorlessness — the standard that commercial white sapphire is produced to.\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: 0.68 Carats\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural White Sapphire\u003c\/li\u003e\n\u003cli\u003eCut: Round (calibrated 5mm)\u003c\/li\u003e\n\u003cli\u003eDimensions: 5mm diameter\u003c\/li\u003e\n\u003cli\u003eTreatment: Heat Treated\u003c\/li\u003e\n\u003cli\u003eColor: Colorless\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\u003c\/ul\u003e\n\n\u003cp\u003eThis 0.68 ct calibrated 5mm round white sapphire has been selected for colorlessness and dimensional consistency — the qualities that make calibrated stones reliable for professional setting work.\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\u003eStandard 5mm Calibration:\u003c\/strong\u003e Drops into any 5mm round setting without adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColorless Performance:\u003c\/strong\u003e Consistent colorlessness for diamond-substitute applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigner Ready:\u003c\/strong\u003e Calibrated format eliminates sizing steps in the manufacturing workflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Source:\u003c\/strong\u003e Treatment disclosed honestly, colorlessness confirmed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis 0.68 ct calibrated 5mm round white sapphire is the practical specification for jewelry designers and custom setters working with standard 5mm round solitaire and bezel components.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003ePerfect Uses for this 5mm Round White Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eStandard 5mm solitaire setting — drop-in fit\u003c\/li\u003e\n\u003cli\u003eDiamond-alternative engagement ring or pendant\u003c\/li\u003e\n\u003cli\u003eEarring center stones (pair) in 5mm settings\u003c\/li\u003e\n\u003cli\u003eCustom jewelry design with standard round components\u003c\/li\u003e\n\u003cli\u003eSeptember birthstone gift\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":42887376896067,"sku":"CG8307","price":169.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/1112023001_5ce1864c-513d-4feb-8896-82e121308196.jpg?v=1778308029","url":"https:\/\/crescentgems.com\/en-ca\/products\/0-68-ct-round-5mm-white-sapphire-colorless","provider":"Crescent Gems","version":"1.0","type":"link"}