Lot 89. Amethyst, tsavorite garnet and diamond 'Prince Frog' pendant. Estimate HK$78,000 - 120,000 (US$10,000 - 15,400). © Tiancheng International

Modelled as a prince frog holding a treasure, the treasure set with an octagonal amethyst weighing approximately 23.05 carats, the frog set with circular-cut tsavorite garnets together weighing approximately 14.05 carats, highlighted by cabochon red hardstone-set eyes together weighing approximately 1.20 carats, to the crown decorated with brilliant-cut diamonds, mounted in 18 karat yellow and blackened gold.

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