Emerald and diamond brooch-pendant, 19th century. Photo courtesy Sotheby's

Centring on a step-cut emerald measuring approximately 21.50 x 18.10 x 12.05mm, framed by a scrolling motif highlighted with single-cut and rose diamonds, encircled by pinched collet-set cushion-shaped stones, partial French maker's mark, pendant fitting and detachable brooch pin. Estimate 140,000 — 230,000 CHF

Accompanied by SSEF report no. 69009, stating that the emerald is of Colombian origin, with a minor amount of oil in fissures.

Provenance: Jewels from the Collection of Odile de Richelieu, Countess Gabriel de La Rochefoucauld, Princess de La Rochefoucauld (1879-1974). This brooch was given to Odile by her mother-in-law, the Countess Aimery de la Rochefoucauld, née Henriette de Mailly Nesle (1852-1913).