Lot 39. Jadeite, ruby and diamond ring, Jason Koo. Estimate HK$3,600,000 - 5,600,000 (US$460,000 - 720,000). © Tiancheng International

Centring on an oval jadeite cabochon of very fine translucency and rich emerald green colour, to a stylised mount decorated with circular-cut rubies and brilliant-cut diamonds, the diamonds together weighing approximately 2.15 carats, mounted in 18 karat white and blackened gold, signed. Ring size: 7.

Cabochon measuring approximately 21.73 x 18.10 x 9.48mm.

Accompanied by Hong Kong Jade & Stone Laboratory report numbered KJ96116, dated 28 July 2017, stating that the jadeite is natural, known in the trade as 'A Jade'.

Mr. Koo started his career in both jewellery designing and manufacturing since 1988. The Hong-Kong based Jewellery designer is recognised for his creativity and craftsmanship in the art of Jewellery making. Passion of natural beauty inspires his creative works which composed of materials such as rock crystal, wood, ivory and other materials rarely used by most jewellery designers. His unique contemporary style is unrestrained reflecting fully of his talents. 

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