Lot 240. An Ottoman gem-set brooch bearing the tughra of Sultan Abdülhamid II (r.1876-1909), Turkey, circa 1900. Estimate 30,000 — 40,000 GBP. Photo: Sotheby's. designed with a central diamond between two gem-set flags (one emerald and the other ruby),...

Gem-set brooch, Michele della Valle. Phote Sotheby's The blackamoor with a carved ebony face, the turban and tunic embellished with a briolette and brilliant-cut diamonds, circular-cut rubies and peridots and a seed pearl, signed Michele della Valle and...