11 novembre 2013
Sapphire and diamond ring, Boucheron
Sapphire and diamond ring, Boucheron. Photo courtesy Sotheby's Centring on cabochon sapphire weighing 12.21 carats, within a double frame of brilliant-cut diamonds, size 51, signed Boucheron, numbered, French assay mark. Estimate 38,000 — 52,000 CHF Accompanied...