Details
Octagonal step-cut sapphire of 8.14 carats, round diamonds, French assay marks for platinum (950‰) and 18K white gold (750‰), signed René Boivin, French maker’s mark (Société René Boivin), 1976, René Boivin fitted case

SSEF, 2025, report n°149441: 8.141 carats, Ceylon (Sri Lanka), no indications of heating

Maison René Boivin, 2025: Certificate of Authenticity n°202512YRE, original piece manufactured by René Boivin in October 1976 after a drawing by Marie-Caroline de Brosses

Diamonds: for an approximate total weight of 1.70-1.90 carat

Size/Dimensions: EU ring size 5012/ US ring size 514
Gross weight: 16.18 grams
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