{"product_id":"french-art-deco-unheated-ceylon-sapphire-ring-5-45ct-octagonal-cut-platinum-c-1925","title":"French Art Deco Unheated Ceylon Sapphire Ring | 5.45ct Octagonal Cut | Platinum | c.1925","description":"\u003cp\u003eA rare Art Deco sapphire of exceptional size and a true octagonal cut that perfectly captures the geometric ambition of the 1920s — certified, unheated, and entirely original to its setting.\u003c\/p\u003e\n\n\u003cp\u003eAt 5.45 carats, this Ceylon sapphire was extracted from the mount for certification and confirmed by the prestigious Bellerophon gem lab, with no indication of heat treatment and a notable faint red fluorescence recorded on the certificate — a telling characteristic of fine natural Ceylon material. The octagonal cut itself is compelling: a true period shape rarely seen at this scale, measuring 9.46mm × 8.73mm × 6.31mm, flanked by ten round brilliants and two baguette diamonds totalling .30ctw in platinum bearing the dog's head hallmark. This is a deco sapphire built for serious collectors who understand exactly what a stone of this size, cut, and certification represents.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch3\u003eDetails\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEra:\u003c\/strong\u003e Art Deco, French, c. 1925\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Platinum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentre Stone:\u003c\/strong\u003e Ceylon sapphire, 5.45ct, unheated, octagonal cut | 9.46mm × 8.73mm × 6.31mm | Bellerophon gem lab certified, faint red fluorescence noted\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccent Stones:\u003c\/strong\u003e 10 round brilliant diamonds; 2 baguette diamonds, .30ctw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 6.25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHallmarks:\u003c\/strong\u003e Dog's head for platinum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Excellent condition; stone original to the ring. Have a close look at the photos.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eShipping \u0026amp; Services\u003c\/h3\u003e\n\u003cp\u003eShips fully insured, signature required via UPS from our NYC office. Full historical certification and appraisal services available upon request — beautiful documented paperwork inclusive of photographs.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe Curio NYC | Fine Historical Jewels | Brooklyn, New York, Paris\u003c\/em\u003e\u003c\/p\u003e","brand":"The Curio NYC","offers":[{"title":"Default Title","offer_id":52251569357031,"sku":"TCN-ART-007","price":12995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0026\/6888\/8123\/files\/IMG_2636_c361e8dc-e0a8-4429-aba0-f48ecdac0ae8.heic?v=1782563284","url":"https:\/\/thecurio.nyc\/products\/french-art-deco-unheated-ceylon-sapphire-ring-5-45ct-octagonal-cut-platinum-c-1925","provider":"Curio Incorporated","version":"1.0","type":"link"}