{"title":"GIA Certified Purple Sapphires - Lab-Verified Natural Star Sapphires","description":"\u003cp\u003ePurple sapphire is a rare and striking color in its own right, and every stone in this collection carries an added phenomenon: six-ray asterism, the star effect that appears as a moving light pattern across the dome of a cabochon-cut stone. Every piece here ships with a GIA identification or origin report, confirming the stone is natural corundum with treatment status disclosed plainly.\u003c\/p\u003e\n\n\u003ch2\u003eWhy GIA-certified purple\u003c\/h2\u003e\n\n\u003cp\u003ePurple sapphire is corundum colored by a combination of trace iron, titanium, and chromium, and star sapphire in particular relies on precisely oriented rutile inclusions to produce asterism — a combination rare enough that independent lab confirmation carries real weight. A GIA report confirms the stone is natural corundum, states whether it has been heat-treated, and for many pieces offers an origin opinion.\u003c\/p\u003e\n\n\u003ch2\u003eWhat to expect\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe star.\u003c\/strong\u003e Look for a sharp, well-centered six-ray star that moves cleanly across the dome under a single light source — the sharper and more centered the star, the more desirable the stone.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTreatment.\u003c\/strong\u003e Star sapphires in this collection are predominantly unheated, since heat treatment can affect asterism; treatment status is confirmed on the GIA report and stated plainly on every product page.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCertification.\u003c\/strong\u003e Every stone here carries a GIA report; the issuing lab and report number are noted on the product page.\u003c\/p\u003e\n\n\u003ch2\u003eShop more phenomenal sapphire\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/natural-star-sapphires-six-ray-asterism-unheated-ceylon\"\u003eStar Sapphire\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/gia-certified-stones\"\u003eAll GIA Certified Stones\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/gia-certified-color-change-sapphires\"\u003eGIA Certified Color-Change Sapphires\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/all-sapphire-gemstones\"\u003eAll Sapphire (every color)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eLearn more\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/information-pages-complete-guide\/what-is-a-gia-sapphire-report-and-how-do-you-read-one\"\u003eHow to Read a GIA Sapphire Report\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/information-pages-complete-guide\/sapphire-buying-guide\"\u003eUltimate Sapphire Buying Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/information-pages-complete-guide\/what-is-an-unheated-sapphire\"\u003eWhat Is an Unheated Sapphire?\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eHave a question about a specific report or want help choosing? Email \u003ca href=\"mailto:crescentgems@gmail.com\"\u003ecrescentgems@gmail.com\u003c\/a\u003e — we respond personally within one business day. Every loose stone qualifies for our 14-day return policy. Select pieces are available through our \u003ca href=\"\/collections\/try-before-you-buy-loose-gemstone\"\u003eTry-On program\u003c\/a\u003e. Free US shipping on every order.\u003c\/p\u003e\n","products":[{"product_id":"3-40-ct-oval-purple-strong-star-sapphire-unheated-gia","title":"3.40 ct Natural Unheated Purple Star Sapphire – Oval cabochon Cut | GIA Certified | Sri Lanka (Ceylon)","description":"\u003cp\u003e3.40 carat oval cabochon purple Strong Star Sapphire from Sri Lanka (Ceylon), 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. Purple body color with a well-centered, fully formed star. Unheated and untreated: the color and asterism are entirely natural. Accompanied by a GIA report confirming weight, dimensions, origin, and unheated status.\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\u003ch3\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eSKU: CG8293\u003c\/li\u003e\n\u003cli\u003eCarat Weight: 3.40 carats\u003c\/li\u003e\n\u003cli\u003eDimensions: 8.64 × 6.76 × 5.69 mm\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Purple Star Sapphire\u003c\/li\u003e\n\u003cli\u003eCut: Oval cabochon\u003c\/li\u003e\n\u003cli\u003eOrigin: Sri Lanka (Ceylon)\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: Purple\u003c\/li\u003e\n\u003cli\u003eClarity: Opaque (characteristic of star sapphire)\u003c\/li\u003e\n\u003cli\u003eCertification: GIA report\u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCare\u003c\/strong\u003e\u003c\/h3\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\u003ch3\u003e\u003cstrong\u003eWhat’s included with Strong Star Sapphire\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eGIA report\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"},{"product_id":"purple-oval-ceylon-sapphire-27","title":"3.26 ct Natural Unheated Purple Star Sapphire – Oval Cabochon Cut | GIA Certified","description":"\u003cp\u003eA natural 3.26 ct Oval Purple Star Sapphire displaying a six-rayed asterism, cut as an oval cabochon, completely unheated, with a GIA report. The six-rayed star is caused by aligned rutile needles within the corundum crystal — when illuminated by a single directional light source (flashlight, sunlight, spotlight), the needle inclusions reflect a sharp, silver-white star that crosses at the apex of the cabochon. This stone's purple body color creates a dramatic contrast with the silver star, a pairing that makes purple star sapphire one of the most visually striking phenomenon gemstones available.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant: the star is only visible under direct single-source light — sunlight, flashlight, or a spotlight. It will not appear under diffuse room lighting.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Choose this 3.26 ct Oval Purple Star Sapphire?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cp\u003eAt 3.26 carats with a GIA report and unheated status, this sits at the premium end of star sapphire collecting. The GIA report confirms the asterism phenomenon, weight, and dimensions — documentation that is rare for star sapphires, which are typically sold without formal certification. The purple body color is less common than gray or blue star sapphires, and the oval cabochon shape allows the star to be viewed from multiple angles without the restrictions of a round.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eKey Benefits of this Natural Star Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGIA-Documented Asterism\u003c\/strong\u003e\u003cbr\u003eIndependent confirmation of the phenomenon, weight, and dimensions — rare for star sapphires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnheated Natural Color\u003c\/strong\u003e\u003cbr\u003eNo thermal treatment — the purple body color and the rutile needles that produce the star are entirely natural.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-Ray Star\u003c\/strong\u003e\u003cbr\u003eA complete, sharp six-rayed asterism under directional light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistinctive Purple Body Color\u003c\/strong\u003e\u003cbr\u003eLess common than blue or gray star sapphire — visually striking contrast with the silver star.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3+ Carat Statement Size\u003c\/strong\u003e\u003cbr\u003eLarge enough to display the star prominently in any setting or mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eCarat Weight: 3.26 Carats\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Purple Star Sapphire\u003c\/li\u003e\n\u003cli\u003eCut: Oval Cabochon\u003c\/li\u003e\n\u003cli\u003eTreatment: Unheated\u003c\/li\u003e\n\u003cli\u003eColor: Purple\u003c\/li\u003e\n\u003cli\u003ePhenomenon: Six-ray asterism — visible under direct single-source light only\u003c\/li\u003e\n\u003cli\u003eClarity: Translucent (characteristic of star sapphire)\u003c\/li\u003e\n\u003cli\u003eCertification: GIA report\u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis 3.26 ct Oval Purple Star Sapphire has been hand-selected for the sharpness and centering of its star and the richness of its purple body color — the two factors that define quality in star sapphire.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Customers Love This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGIA Documentation:\u003c\/strong\u003e Rare formal certification for a phenomenon stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnheated Status:\u003c\/strong\u003e Natural rutile silk produces the star without enhancement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDramatic Visual Effect:\u003c\/strong\u003e The silver star against purple body color is immediately striking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Source:\u003c\/strong\u003e GIA-confirmed quality, treatment status disclosed honestly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eOwning this 3.26 ct unheated GIA purple star sapphire means investing in a phenomenon gemstone with the documentation to match its visual impact.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003ePerfect Uses for this 3.26 ct Purple Star Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eStatement pendant — the star is most visible when the stone hangs freely\u003c\/li\u003e\n\u003cli\u003eLarge center stone for a bespoke signet or cocktail ring\u003c\/li\u003e\n\u003cli\u003eCollectors of phenomenon gemstones with GIA documentation\u003c\/li\u003e\n\u003cli\u003eGentleman's ring center stone\u003c\/li\u003e\n\u003cli\u003eAstrological or spiritual use\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":42665946021955,"sku":"CG8288","price":2834.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/stone_CG8288_image-1.jpg?v=1778308921"},{"product_id":"7-98-ct-round-gray-star-sapphire-unheated","title":"7.99 ct Natural Unheated Purple Star Sapphire – Round Cabochon Cut | GIA Certified | Sri Lanka (Ceylon)","description":"\u003cp\u003eA natural 7.99 ct Round Purple Star Sapphire , from Sri Lanka (Ceylon), completely unheated, with a GIA report. This stone displays a six-rayed asterism — a sharp silver-white star that moves across the dome when illuminated by a single directional light source. The round cabochon format is the most classical shape for star sapphires, centering the star symmetrically on the dome for maximum visual impact. At 7.99 carats unheated from documented Ceylon origin, this stone sits at the premium tier of the star sapphire market.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: rgb(195, 9, 9)\"\u003e\u003cstrong\u003eSTAR WILL ONLY BE SEEN UNDER DIRECT SUNLIGHT OR FLASHLIGHT.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Choose this 7.99 ct Unheated Round Purple Star Sapphire?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe round cabochon is the preferred format for star sapphires because the symmetric dome presents the six-ray star with equal arm length in all directions, making the phenomenon as visually balanced as possible. At 7.99 carats, the star is large enough to be clearly visible across a room under a single light source, and the GIA report confirms the asterism, the unheated status, and the Ceylon origin.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eKey Benefits of this 7.99 ct Round Purple Star Sapphire \u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnheated Ceylon Origin\u003c\/strong\u003e\u003cbr\u003eNo thermal treatment — the asterism and gray body color are entirely natural.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound Cabochon — Classical Format\u003c\/strong\u003e\u003cbr\u003eThe round dome presents the six-ray star with perfect symmetry — the traditional star sapphire format.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharp Six-Ray Asterism\u003c\/strong\u003e\u003cbr\u003eA complete, sharp six-rayed silver star under direct single-source illumination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNear-8-Carat Scale\u003c\/strong\u003e\u003cbr\u003eAt this size the star has commanding room-scale presence under a single light source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness: 9 on the Mohs scale\u003c\/strong\u003e\u003cbr\u003eCorundum durability for any jewelry application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eCarat Weight: 7.99 Carats\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Purple Star Sapphire\u003c\/li\u003e\n\u003cli\u003eCut: Round Cabochon\u003c\/li\u003e\n\u003cli\u003eOrigin: Sri Lanka (Ceylon)\u003c\/li\u003e\n\u003cli\u003eTreatment: Unheated\u003c\/li\u003e\n\u003cli\u003eColor: Gray\u003c\/li\u003e\n\u003cli\u003ePhenomenon: Six-ray asterism — visible under direct single-source light only\u003c\/li\u003e\n\u003cli\u003eClarity: Translucent (characteristic of star sapphire)\u003c\/li\u003e\n\u003cli\u003eCertification: GIA report \u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis 7.99 ct Round Purple Star Sapphire  has been hand-selected for the quality of its six-ray star and its gray body color — the two elements that define a fine star sapphire regardless of size.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Customers Love This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGIA Documentation :\u003c\/strong\u003e Ceylon origin, unheated status, and asterism confirmed by GIA report.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound Symmetry:\u003c\/strong\u003e The classical cabochon format for maximum star symmetry and visual balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNear-8-Carat Presence:\u003c\/strong\u003e Commanding scale for statement jewelry and collector display.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Source:\u003c\/strong\u003e Ceylon origin, unheated, every attribute disclosed honestly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eOwning this 7.99 ct unheated round Purple star sapphire means choosing a phenomenon gemstone with classical format, exceptional scale, and GIA documentation.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003ePerfect Uses for this 7.99 ct Purple Star Sapphire\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eStatement pendant — star visible under any single light\u003c\/li\u003e\n\u003cli\u003eLarge collector or display piece\u003c\/li\u003e\n\u003cli\u003eGentleman's statement ring\u003c\/li\u003e\n\u003cli\u003eInvestment in documented premium star sapphire\u003c\/li\u003e\n\u003cli\u003eAstrological or spiritual jewelry at meaningful weight\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":43174591529027,"sku":"CG8441","price":3990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/stone_CG8441_image-1.jpg?v=1779989740"}],"url":"https:\/\/crescentgems.com\/collections\/gia-certified-purple-sapphires-collection.oembed","provider":"Crescent Gems","version":"1.0","type":"link"}