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An important diamond ring. Photo Bonhams

Set with a cushion modified brilliant-cut diamond, weighing 10.15 carats, to a thin diamond-set hoop, mounted in platinum, ring size 4½. Sold for HK$ 8.3 million.

Accompanied by a certificate from GIA, stating that the 10.15 carats diamond is D colour and IF clarity. Report number 2125361239, dated 03 June 2011

Further accompanied by a letter from GIA stating that the diamond has been determined to be Type IIa

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A coloured diamond and diamond ring. Photo Bonhams

Set with an emerald-cut fancy intense yellow diamond, weighing 6.41 carats, within a double-tiered round brilliant-cut diamond surround, to openwork gallery and bifurcated shoulders set with colourless diamonds and diamonds of yellow hue, mounted in 18k yellow gold and platinum, the coloured diamonds (excluding the principal diamond) estimated to weigh approximately 0.20 carats in total, the colourless diamonds estimated to weigh approximately 0.45 carats in total, ring size 6¼. Lot 729. Sold for HK$ 1.2 million 

Accompanied by a certificate from GIA, stating that the 6.41 carats diamond is natural fancy intense yellow colour and VS1 clarity. Report number 2105935184, dated 16 July 2009

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A pair of diamond earringsPhoto Bonhams

Each bar suspending a chain of 5 hoops, pavé-set throughout with round brilliant-cut diamonds, terminating in a pear-shaped briolette-cut diamond, weighing 5.83 carats, within a round brilliant-cut diamond surround, mounted in 18k white gold, the remaining diamonds estimated to weigh approximately 3.50 carats in total, signed 'Villa', earring length 6.0cm. Lot 705. Sold for HK$ 1.2 million

Accompanied by two certificates from HRD, stating the following:

The 5.83 carats briolette-cut diamond is I colour and SI1 clarity. Report number 06026454001, dated 10 Nov 2006

The 5.83 carats briolette-cut diamond is J colour and loupe-clean clarity. Report number 06025236001, dated 3 Nov 2006

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A diamond ring. Photo Bonhams

Set with a modified marquise brilliant-cut diamond, weighing 4.01 carats, to diamond-set pierced gallery and between diamond shoulders, mounted in 18k white gold, the diamonds (excluding the principal diamond) estimated to weigh approximately 0.40 carats in total, ring size 3¾ - 5 (with sizing bar). Lot 716. Sold for HK$ 1.0 million

Accompanied by a certificate from GIA, stating that the 4.01 carats diamond is E colour and VVS2 clarity. Report number 2105739250, dated 18 May 2009

Bonhams. 26 May 2012 2 p.m. Hong KongFine Jewellery & Jadeite