An Important Unmounted Pear-Shaped Diamond.

An unmounted pear - shaped diamond weighing 17.80 carats. Estimate  HK$24,600,000 - 28,600,000 / US$3,153,800 - 3,666,700

Accompanied by GIA report *2125946220, dated 23rd February, 2011, stating that the 17.80 carat diamond is D colour, Internally flawless clarity, with excellent polish; also accompanied by diamond type classifciation report stating that the diamond is determined to be a Type IIa diamond. Type IIa diamonds are the most chemically pure type of diamond and often have exceptional translucency.

An Important Diamond Ring.

Centring on a marquise - shaped diamond weighing 9.03 carats, flanked on each side by a shield - cut diamond, mounted in platinum. Ring size 6. Estimate HK$9,350,000 - 13,000,000 / US$1,198,700 - 1,666,700

Accompanied by GIA report *15324190, dated 08 July 2010, stating that the 9.03 carats diamond is D colour, internally flawless clarity; also accompanied by a diamond type classification report stating that the diamond is determined to be a Type IIa diamond. Type IIa diamonds are the most pure type of diamond and often have exceptional translucency.

An Elegant Diamond Necklace.

Composed of 45 graduated cushion-shaped diamonds weighing from 1.01 to 4.03 carats, mounted in platinum. Length 41.5 cm. Estimate HK$6,600,000 - 8,500,000 / US$846,200 - 1,089,700

Accompanied by 45 reports from the Gemological Institute of America stating that the forty - five cushion - shaped diamonds weighing from 1.01 to 4.03 carats, ranging from F - H colour, VVS1 to VS2 clarity. Diamonds in total weighing 70.25 carats.

An Elegant Diamond Bracelet.

Composed of twenty - three graduated brilliant - cut diamonds together weighing 26.15 carats, mounted in platinum. Length 16.5 cm. Estimate HK$4,200,000 - 5,200,000 / US$538,500 - 666,700

Accompanied by 23 reports from the Gemological Institute of America , stating that the twenty three brilliant - cut diamonds weighing from 1.01 to 1.35 carat, are ranging from D - F colour, IF - VVS2 clarity, diamonds altogether weighing 26.15 carats.

A Diamond Ring

Simply set with a brilliant - cut diamond weighing 13.01 carats, mounted in platinum. Ring size 6. Estimate HK$3,380,000 - 3,900,000 / US$433,300 - 500,000

Accompanied by HRD Antwerpen report *07014194001 dated 26 June 2007 stating that the 13.01 carat diamond is K colour, loupe clean (Internally flawless) clarity

A Diamond Ring

Simply set - with a brilliant - cut diamond weighing 10.16 carats, mounted in platinum. Ring size 6. Estimate HK$3,250,000 - 4,250,000 / US$416,700 - 544,900

Accompanied by GIA report *16754485 dated 24 Dec 2007 stating that the 10.16 carat diamond is J colour, VS1 clarity, with excellent cut.

A Diamond Ring

Centring on an oval - shaped diamond weighing 7.00 carats, flanked on each side by a shield - cut diamond together weighing 1.21 carats, mounted in platinum. Ring size 6. Estimate HK$2,900,000 - 3,800,000 / US$371,800 - 487,200

Accompanied by Gemological Institute of America report number 15774541 dated 16 May 2007 stating that the 7.00 carat diamond is G colour, VVS2 clarity.

A Diamond Bracelet.  

 Simply set with a brilliant - cut diamond weighing 13.01 carats, mounted in platinum. Ring size 6. Estimate HK$2,650,000 - 3,350,000 / US$340,000 - 429,500

Accompanied by HRD Antwerpen report *07014194001 dated 26 June 2007 stating that the 13.01 carat diamond is K colour, loupe clean (Internally flawless) clarity.

A Diamond Solitaire Ring.

Simply set with an emerald - cut diamond weighing 5.39 carats, mounted in platinum. Ring size 6. Estimate HK$2,480,000 - 3,480,000 / US$318,000 - 446,200

Accompanied by GIA report *10643784 dated 19 May 2011 stating that 5.39 carat diamond is E colour, VVS1 clarity.

A Diamond Ring 

Centring on an octagonal step - cut (Asscher - cut) diamond weighing 5.45 carats, within pavé set fancy pink and colourless diamonds, mounted in platinum and 18k rose gold. Ring size 6. Estimate HK$2,450,000 - 3,250,000 / US$314,100 - 416,700

Accompanied by GIA report *12227869 dated 6 June 2008 stating that the 5.45 carat diamond is E colour, VVS2 clarity.

A Diamond Ring

Centring on an emerald - cut diamond weighing 5.16 carats, flanked on each side by a trapeze - shaped diamond, mounted in platinum. Ring size 6. Estimate HK$2,200,000 - 3,000,000 / US$282,100 - 384,600

Accompanied by GIA report *12546398, dated 27 Oct 2009, stating that the 5.16 carats diamond is F colour, Internally Flawless clarity.

A Diamond Ring

Centring on a pear - shaped diamond weighing 5.03 carats, surrounded by micro - set brilliant - cut diamonds, anchored to three rows of shoulder set with diamonds, mounted in platinum. Ring size 6. Estimate HK$2,200,000 - 3,000,000 / US$282,100 - 384,600

Accompanied by GIA report *5121644718 dated 30 September 2010 stating that the 5.03 carat diamond is D colour, VS2 clarity.

A Pair of Dangling Diamond Pendent Earrings.

Each suspending with four graduated cushion - shaped diamonds weighing from 1.02 to 2.15 carats, mounted in platinum. Length 3.7 cm. Estimate HK$1,180,000 - 1,600,000 / US$151,000 - 205,000

Accompanied by eight reports from the Gemological Institute of America, stating that the eight cushion - shaped diamond weighing from 1.02 to 2.15 carats, ranging from D - G colour, VVS2 - VS1 clarity. Diamonds in total weighing 12.28 carats. 

A Diamond Ring

Simply set with a brilliant - cut diamond weighing 6.41 carats, mounted in platinum. Ring size 6. Estimate HK$1,600,000 - 2,300,000 / US$205,100 - 294,900

Accompanied by GIA report *5121692460 dated 12 November 2010 stating that the 6.41 carat diamond is I colour, VS2 clarity, with excellent cut, polish and symmetry.

A Diamond Ring

Centring on a square emerald - cut diamond weighing 5.06 carats, mounted in platinum. Ring size 6. Estimate HK$1,550,000 - 1,950,000 . US$195,000 - 250,000

Accompanied by GIA reports *1112543787 dated 19 January 2010 stating that the 5.06 carat diamond is G colour, VVS2 clarity.

A Unique Diamond Ring.

Centring on an old - mine, brilliant - cut diamond weighing 7.52 carats, decorated with 394 pavé set diamonds together weighing 1.41 carats, mounted in 18k white gold with grey rodium finish. Ring size 6. Estimate HK$1,450,000 - 1,850,000 / US$186,900 - 237,200

Accompanied by GIA report *2125223100, dated 10 June 2010 stating that the 7.52 carats diamond is J colour, VS1 clarity.

An Elegant Diamond Ring.

Centring on an emerald - cut diamond weighing 7.00 carats, flanked on each side by two taper baguette - cut diamonds, mounted in platinum. Ring size 6. Estimate HK$1,280,000 - 1,800,000 / US$164,000 - 230,000

Accompanied by GIA report *10423484 dated 12 December 2007, stating that the 7.00 carat diamond is J colour, VVS1 clarity.

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