Lot 1653. Art Deco Emerald and Diamond Brooch, Cartier, Circa 1925. Estimate HK$800,000–1,200,000 (103,000–154,000 USD). Photo: Sotheby's

 Centring on a shield-shaped carved emerald, to the marquise-shaped, circular-cut and baguette diamond surround and surmount, decorated with carved colourless stones and black enamel, mounted in platinum, signed Cartier and numbered, with French assay marks.

Sotheby's. Magnificent Jewels and Jadeite, Hong Kong, 04 Apr 2017, 02:30 PM