Round sapphires, round diamonds, French assay mark for 18K yellow gold (750‰), signed René Boivin, French maker’s mark (Voirin-Saurel), 1976 Maison René Boivin, 2025: Certificate of Authenticity n°202512YRS, original piece manufactured by René Boivin in March 1976 after a drawing by Marie-Caroline de Brosses Sapphires: for an approximate total weight of 3.80-4.20 carats Diamonds: for an approximate total weight of 0.30-0.50 carat Size/Dimensions: EU ring size 471⁄2/ US ring size 41⁄4 Gross weight: 15.83 grams

Cf. F. Cailles, René Boivin, Joaillier, Les Éditions de l'Amateur, Paris, 1994, p. 363 for a similar piece.