Lot 1712, Queen Amelia of Portugal's Important Colombian Emerald and Diamond Brooch, late 19th century. Estimate 9,500,000 — 12,000,000 HKD (1,098,240 - 1,387,250 EUR ). Photo Sotheby's Designed as an old-mine- and rose-cut diamond scroll cartouche, centring...

A delicate antique natural pearl and diamond brooch. Photo Christie's Image Ltd 2013 The base set with a natural button-shaped pearl, measuring approximately 13.2-13.4 x 8.5 mm, in an old-cut diamond surround, extending five diamond-set branches, each...