French Art Deco Unheated Ceylon Sapphire Ring | 5.45ct Octagonal Cut | Platinum | c.1925
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A 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.
At 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.
Details
- Era: Art Deco, French, c. 1925
- Materials: Platinum
- Centre Stone: Ceylon sapphire, 5.45ct, unheated, octagonal cut | 9.46mm × 8.73mm × 6.31mm | Bellerophon gem lab certified, faint red fluorescence noted
- Accent Stones: 10 round brilliant diamonds; 2 baguette diamonds, .30ctw
- Size: 6.25
- Hallmarks: Dog's head for platinum
- Condition: Excellent condition; stone original to the ring. Have a close look at the photos.
Shipping & Services
Ships 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.
The Curio NYC | Fine Historical Jewels | Brooklyn, New York, Paris
