A Coloured Diamond Ring. Photo courtesy Tiancheng International

Set with three cut-cornered square modified brilliant - cut diamond of fancy light green, light pink and light green - yellow colour weighing of 0.90, 0.56 and 0.46 carat respectively, surrounded by 184 diamonds, mounted in platinum. Ring size 6. Estimate HK$230,000 - 350,000. US$29,500 - 45,000

Accompanied by GIA reports* 17489385 dated 10 October 2008 stating that the 0.90 carat diamond is natural, fancy light green colour, SI clarity; *15716673 dated 09 March 2007 stating that the 0.56 carat diamond is natural, fancy light pink colour, *15198517, dated 22 August 2006 stating that the 0.46 carat diamond is natural, fancy light green - yellow colour.

Tiancheng International. Hong Kong Autumn Auction 2011. 28 Nov 2011 www.tianchengauction.com