Lot 5. Jadeite, cultured pearl and diamond ring, Jason Koo. Estimate HK$250,000 - 450,000 (US$32,000 - 58,000). © Tiancheng International

Centring on an oval jadeite cabochon of fine translucency and emerald green colour, decorated with brilliant-cut diamonds extending to the shoulders, accented by cultured pearl beads measuring approximately 2.20mm, mounted in platinum and 18 karat white gold, signed. Ring size: 6½ 

Cabochon measuring approximately 16.75 x 10.43 x 4.39mm.

Accompanied by Hong Kong Jade & Stone Laboratory report numbered KJ96115, dated 28 July 2017, stating that the jadeite is natural, known in the trade as 'A Jade'.

Tiancheng International. Jewellery and Jadeite, 2 October 2017  · 1 pm