{"product_id":"4-31-ct-chrysoberyl-cats-eye-gia","title":"4.25 ct Natural Untreated Cat's Eye Chrysoberyl – Oval Cabochon | GIA Certified | Sri Lanka (Ceylon)","description":"\u003cp\u003eA natural 4.25 carat Oval Cat's Eye Chrysoberyl cabochon, completely untreated and now GIA certified (Report #6247017765). Cat's eye chrysoberyl is the most prized chatoyant gemstone — a phenomenon stone that displays a sharp, single band of light (the cat's eye) that glides across the dome of the cabochon as the stone is rotated. At 4.25 carats, this is a collector-grade specimen: cat's eye chrysoberyl above 3 carats with a sharp, well-defined eye represents the premium tier of this phenomenon category. Chrysoberyl ranks 8.5 on the Mohs scale — harder than most gem species outside the corundum family.\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\"What stands out on this 4.25 ct chrysoberyl is the sharpness of the eye against a silver band — that crispness, combined with a completely untreated, GIA-confirmed origin story, is what puts a cat's eye in the collector-grade tier rather than the commercial one.\"\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 handful of factors combine to make this specific chrysoberyl an uncommon find, even within the cat's eye category:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e A greenish yellow body color of medium saturation, paired with a sharp silver eye — a distinct combination noted in the stone's own color record.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e At 4.25 carats, this stone sits above the 3-carat threshold the listing itself identifies as the point where sharp-eyed cat's eye chrysoberyl becomes collector-grade material.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Completely untreated (\"No Enhancement\"), which is the natural state for the finest cat's eye chrysoberyl and is not something every stone on the market can claim.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhenomenon:\u003c\/strong\u003e Displays true chatoyancy — a single, sharp band of light that glides across the dome as the stone is rotated, rather than a diffuse or poorly-centered eye.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e Backed by a GIA Cat's Eye Chrysoberyl Report (#6247017765) confirming species and phenomenon; the Sri Lanka (Ceylon) origin is the store's own assessment and is not covered by that report.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e A sharp-eyed, untreated, GIA-documented cat's eye chrysoberyl over 4 carats is genuinely uncommon — most material seen on the market is smaller, treated, or shows a softer, less centered eye.\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 under a single direct light source,\u003c\/strong\u003e such as a flashlight or spotlight, to see the sharp band glide across the dome — diffuse or multi-directional lighting will mute the effect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlan the setting around the cabochon's dome.\u003c\/strong\u003e At 9.63 x 7.55 x 5.41 mm, this is a moderately domed oval cabochon, so a bezel or protective prong setting that leaves the dome unobstructed will show the eye best.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAsk any seller for the GIA report number\u003c\/strong\u003e when comparison-shopping cat's eye chrysoberyl, and confirm whether the stone is disclosed as untreated — not all cat's eye material sold online carries that disclosure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability is limited to this single piece.\u003c\/strong\u003e As a natural cabochon, this stone is one of a kind by nature, and the combination of size, sharp eye, and untreated status described above is not something that can 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=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/cats-eye-chrysoberyl-buyers-guide\"\u003eCat's Eye Chrysoberyl Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/alexandrite-buyers-guide\"\u003eAlexandrite Guide (Color-Change Chrysoberyl)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/how-gems-are-formed-nature-s-incredible-underground-process\"\u003eHow Gemstones Are Formed\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\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;\"\u003eCG8442\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;\"\u003e4.25 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;\"\u003eChrysoberyl, Cat's-Eye variety\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 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;\"\u003e9.63 x 7.55 x 5.41 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;\"\u003eGreenish Yellow, Medium saturation\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;\"\u003eChatoyancy (Cat's-Eye), sharp silver eye\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;\"\u003eUntreated (No Enhancement)\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) — store assessment, not covered by GIA report\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;\"\u003eEye 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;\"\u003e8.5 (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 #6247017765\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eWhy the Cat's Eye Effect Happens\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCat's eye chrysoberyl's chatoyancy phenomenon is caused by microscopic parallel needle-like inclusions aligned within the crystal — light reflects off these needles as a single sharp band. The finest examples show a strong, well-defined eye and a \"milk and honey\" effect: when illuminated from one side, half the dome appears lighter and half darker, divided by the moving band of the eye.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFeatures of this Cat's Eye Chrysoberyl\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSKU: CG8442\u003c\/li\u003e\n\u003cli\u003eCarat Weight: 4.25 carats\u003c\/li\u003e\n\u003cli\u003eDimensions: 9.63 × 7.55 × 5.41 mm\u003c\/li\u003e\n\u003cli\u003eGem Type: Natural Chrysoberyl, Cat's-Eye variety\u003c\/li\u003e\n\u003cli\u003eCut: Oval Cabochon\u003c\/li\u003e\n\u003cli\u003eOrigin: Sri Lanka (Ceylon) — store assessment, not covered by this GIA report\u003c\/li\u003e\n\u003cli\u003eTreatment: Untreated\u003c\/li\u003e\n\u003cli\u003eColor: Greenish Yellow\u003c\/li\u003e\n\u003cli\u003ePhenomenon: Displaying Chatoyancy — a sharp band of light moving across the dome\u003c\/li\u003e\n\u003cli\u003eTransparency: Transparent\u003c\/li\u003e\n\u003cli\u003eClarity: Eye Clean\u003c\/li\u003e\n\u003cli\u003eCertification: GIA Cat's Eye Chrysoberyl Report #6247017765\u003c\/li\u003e\n\u003cli\u003eHardness: 8.5 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis 4.25 ct Oval Cat's Eye Chrysoberyl has been hand-selected as a collector-grade specimen — sharpness of the eye, quality of the chatoyancy effect, and size all meet the criteria for the premium tier of this phenomenon category.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCare\u003c\/strong\u003e\u003c\/h2\u003e\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\u003eAvoid ultrasonic or steam cleaners, which can affect the cabochon's polish and chatoyant effect\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGIA Cat's Eye Chrysoberyl Report #6247017765\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":43232607273027,"sku":"CG8442","price":35346.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/stone_CG8442_image-1.jpg?v=1780471047","url":"https:\/\/crescentgems.com\/en-gcc\/products\/4-31-ct-chrysoberyl-cats-eye-gia","provider":"Crescent Gems","version":"1.0","type":"link"}