{"product_id":"3-40-ct-oval-violet-star-sapphire-unheated-gia","title":"3.40 ct Natural Unheated Violet Star Sapphire – Oval Cabochon Cut | GIA Certified | Sri Lanka (Ceylon)","description":"\u003cp\u003e3.40 carat oval cabochon violet star sapphire, unheated, measuring 8.64 × 6.76 × 5.69 mm. The stone displays a sharp, six-rayed silver star across its domed surface under directional light — the asterism phenomenon produced by microscopic rutile needle inclusions aligned within the crystal. Violet body color with a well-centered, fully formed star. Unheated and untreated: the color and asterism are entirely natural. Accompanied by GIA Report #1236950499 confirming weight, dimensions, and unheated status. Geographic origin was not requested as part of this GIA report; the Sri Lanka (Ceylon) origin noted below reflects our own sourcing documentation rather than a GIA origin determination.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #e60000\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color: #e60000\"\u003e The star is visible only under a single directional light source — direct sunlight, a flashlight, or a spotlight. It will not appear under diffuse or overhead ambient lighting.\u003c\/span\u003e\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\u003e\u003cspan role=\"text\" style=\"color: #4a235a\"\u003e\u003cstrong\u003eExpert Opinion\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\"What stops you on this stone is the star itself — a sharp, well-centered six-ray asterism sitting squarely on a violet body color, at a substantial 3.40 carats. That combination is uncommon on its own, and it's entirely natural: unheated, untreated, nothing done to produce or enhance the effect you're seeing. Fine asterism like this is delicate; it's easily disrupted by heat treatment, which is exactly why an unheated star of this quality stands out to me.\" — Ahmed Shareek\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\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe phenomenon itself:\u003c\/strong\u003e Asterism requires a very specific internal structure — fine, densely packed rutile needles (\"silk\") aligned along the crystal's growth directions during formation. Most corundum never develops this structure at all, and among the fraction that does, few produce a star as sharp, well-centered, and fully formed across all six rays as this one. That alone puts phenomenon stones in a different rarity tier from standard faceted sapphires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eViolet body color:\u003c\/strong\u003e Star sapphires are overwhelmingly blue, gray, or black; violet is a distinctly uncommon body color for asterism to appear in, making this stone a smaller niche within an already-niche category of gemstone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnheated status:\u003c\/strong\u003e Heat treatment is standard practice in the sapphire trade and frequently disrupts or destroys fine silk, which is what produces asterism in the first place — so this stone's unheated status is independently significant, and pairing it with a star this well-formed is notable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e At 3.40 carats, this is a substantial star sapphire; large stones with strong, centered asterism become progressively harder to source as size increases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e Accompanied by GIA Report #1236950499, confirming weight, dimensions, and unheated status. Note that geographic origin was not requested as part of this GIA report — the Sri Lanka (Ceylon) origin is seller-stated, based on our own sourcing documentation, not a GIA origin determination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e A sharp, well-centered six-ray star, in an uncommon violet body color, fully natural and unheated, at 3.40 carats with GIA documentation — each factor compounds the others, making this a genuinely uncommon stone rather than merely a good example of a common type.\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\u003cul\u003e\n\u003cli\u003eAs noted above, the star is only visible under a single directional light source — direct sunlight, a flashlight, or a spotlight. Under diffuse or overhead ambient lighting it will not appear; view the stone under a point light source to see the asterism at its best.\u003c\/li\u003e\n\u003cli\u003eWhen judging star quality, look for sharpness (crisp, thin rays rather than fuzzy or diffuse ones), centering (the star's axis point sitting in the middle of the dome), and completeness (all six rays fully formed and reaching the edge of the dome, not broken or partial).\u003c\/li\u003e\n\u003cli\u003eAn opaque body with a translucent dome at the star's apex is characteristic of star sapphire and should not be read as a clarity defect — it's the normal optical structure that allows the asterism to display.\u003c\/li\u003e\n\u003cli\u003eOrigin is seller-stated: the Sri Lanka (Ceylon) attribution reflects our own sourcing documentation, not a GIA origin determination, since origin was not requested as part of the GIA report on this stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTry Before You Buy:\u003c\/strong\u003e Because asterism is a lighting-dependent phenomenon, we recommend viewing the stone under a single directional light source yourself before making a final decision — reach out with any questions about viewing conditions.\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\/star-sapphire-complete-buyers-guide\"\u003eStar Sapphire — The Complete Buyer's Guide to the Phenomenon Gemstone\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/how-to-tell-if-star-sapphire-is-natural\"\u003eHow to Tell If a Star Sapphire Is Natural: A Complete Identification Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/violet-sapphires-the-rare-beauty-of-royal-purple-elegance\"\u003eViolet Sapphire — The Complete Buyer's Guide to Color, Origin, and Value\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\"\u003eWhat Is a GIA Sapphire Report and How Do You Read One?\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 Sapphire Rings — The Complete Guide to Designing Your Own\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/sapphire-buying-guide\"\u003eThe Ultimate Guide to Buying Natural Loose Sapphires\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/what-is-an-unheated-sapphire\"\u003eWhat Is an Unheated Sapphire? The Complete Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/pages\/ceylon-sapphire-origin-guide\"\u003eCeylon Sapphire — Why Sri Lanka Origin Matters\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;\"\u003eCG8293\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;\"\u003e3.40 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 Violet Star 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;\"\u003eOval, Double Cabochon\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;\"\u003e8.64 × 6.76 × 5.69 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;\"\u003eViolet\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;\"\u003eSix-ray asterism\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;\"\u003eNone — unheated and untreated\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) — seller-stated, GIA origin not requested\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;\"\u003eOpaque body with translucent asterism dome (characteristic of star 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;\"\u003eTransparency\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eTranslucent\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 #1236950499\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eSKU: CG8293\u003c\/li\u003e\n\u003cli\u003eCarat Weight: 3.40 carats\u003c\/li\u003e\n\u003cli\u003eVariety: Violet Star Sapphire\u003c\/li\u003e\n\u003cli\u003eShape: Oval\u003c\/li\u003e\n\u003cli\u003eCutting Style: Double Cabochon\u003c\/li\u003e\n\u003cli\u003eDimensions: 8.64 × 6.76 × 5.69 mm\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Violet Star Sapphire\u003c\/li\u003e\n\u003cli\u003eOrigin: Sri Lanka (Ceylon) — per seller sourcing documentation, not a GIA origin determination\u003c\/li\u003e\n\u003cli\u003ePhenomenon: Six-ray asterism\u003c\/li\u003e\n\u003cli\u003eTreatment: None — unheated and untreated\u003c\/li\u003e\n\u003cli\u003eColor: Violet\u003c\/li\u003e\n\u003cli\u003eTransparency: Translucent\u003c\/li\u003e\n\u003cli\u003eClarity: Opaque body with translucent asterism dome (characteristic of star sapphire)\u003c\/li\u003e\n\u003cli\u003eCertification: GIA Report #1236950499\u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cstrong\u003eCare\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eClean with lukewarm water and mild soap using a soft brush\u003c\/li\u003e\n\u003cli\u003eStore separately to avoid surface contact\u003c\/li\u003e\n\u003cli\u003eRemove before heavy physical activity\u003c\/li\u003e\n\u003cli\u003eAvoid ultrasonic or steam cleaners\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cstrong\u003eOne of a Kind\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThis is a single natural gemstone, not a manufactured or lab-created replica — no two star sapphires form with identical color, asterism pattern, 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\u003cstrong\u003eWhat's included with this Violet Star Sapphire\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eGIA Report #1236950499\u003c\/li\u003e\n\u003cli\u003eGemstone packed in a gem sleeve\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":42665945923651,"sku":"CG8293","price":2380.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/stone_CG8293_image-1.jpg?v=1778308923","url":"https:\/\/crescentgems.com\/products\/3-40-ct-oval-violet-star-sapphire-unheated-gia","provider":"Crescent Gems","version":"1.0","type":"link"}