Lot 93. Tanzanite, gem-set and diamond 'hummingbird' brooch, Nisan. Estimate HK$58,000 - 88,000 (US$7,400 - 11,300). © Tiancheng International

Modelled as a humming bird holding, the humming bird set with circular-cut pink, yellow sapphires, tsavorite garnets, black diamonds and diamonds, suspending to the beak with an oscillating pear-shaped tanzanite weighing approximately 4.05 carats, spaced by a pear-shaped diamond, the coloured sapphires and tsavorite garnets together weighing approximately 7.00 and 2.50 carats respectively, the black diamonds and diamonds together weighing approximately 2.95 carats, mounted in titanium, 18 karat yellow and blackened gold, signed.

Tiancheng International. Jewellery and Jadeite, 2 Oct · 1 pm