CARTIER: SAPPHIRE AND DIAMOND RING The oval-cut sapphire weighs approximately...
CARTIER: SAPPHIRE AND DIAMOND RING
The oval-cut sapphire weighs approximately 11.5 carats and is flanked by two pear-cut diamonds; signed Cartier Paris, numbered R12106, French hallmarks for 18-karat gold (750 ‰) and platinum (850 ‰), master’s mark for the Société de Fabrication de Haute Joaillerie, ring size 54, gross weight 7.45 g.
Accompanied by a report from the Bellerophon Laboratory certifying that it is a natural sapphire from Madagascar, which may be described as “Royal Blue” in the trade, with no indication of treatment. Report No. A20555 dated September 30, 2026.
CARTIER: SAPPHIRE AND DIAMOND RING
The oval-cut sapphire weighing approximately 11.5 carats, flanked by two pear-cut diamonds, signed Cartier Paris, numbered R12106, French assay marks for 18-carat gold and platinum, maker’s mark for Société de Fabrication de Haute Joaillerie, ring size N, gross weight 7.45 grams.
Accompanied by a report from Bellerophon stating that the sapphire is natural, of Madagascar origin, may be referred to as “Royal Blue” in the trade, with no indications of treatment. Report No. A20555, dated September 30, 2026.
For further information on this lot, please visit Bonhams.com
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CARTIER: SAPPHIRE AND DIAMOND RING
The oval-cut sapphire weighs approximately 11.5 carats and is flanked by two pear-cut diamonds; signed Cartier Paris, numbered R12106, French hallmarks for 18-karat gold (750 ‰) and platinum (850 ‰), master’s mark for the Société de Fabrication de Haute Joaillerie, ring size 54, gross weight 7.45 g.
Accompanied by a report from the Bellerophon Laboratory certifying that it is a natural sapphire from Madagascar, which may be described as “Royal Blue” in the trade, with no indication of treatment. Report No. A20555 dated September 30, 2026.
CARTIER: SAPPHIRE AND DIAMOND RING
The oval-cut sapphire weighing approximately 11.5 carats, flanked by two pear-cut diamonds, signed Cartier Paris, numbered R12106, French assay marks for 18-carat gold and platinum, maker’s mark for Société de Fabrication de Haute Joaillerie, ring size N, gross weight 7.45 grams.
Accompanied by a report from Bellerophon stating that the sapphire is natural, of Madagascar origin, may be referred to as “Royal Blue” in the trade, with no indications of treatment. Report No. A20555, dated September 30, 2026.
For further information on this lot, please visit Bonhams.com
Estimate
Time, Location
Auction House
