A magnificent diamond ring, by J. Roca.  photo: Christie's Images Ltd 2010

The ring composed of a cut-cornered rectangular diamond weighing 17.71 carats to the tapered baguette-cut diamond shoulders with plain hoop. Signed by J. Roca. Estimate $1,000,000 - $1,500,000 - Price Realized $1,314,500

Accompanied by report no. 5111816766 dated 11 March 2010 from the GIA Gemological Institute of America stating that the diamond is D Colour, VVS2 clarity

An important coloured diamond ring. photo: Christie's Images Ltd 2010

The ring composed of a rectangular-cut Fancy Intense Yellow diamond weighing 26.61 carats. Estimate $450,000 - $500,000  - Price Realized $722,500

Accompanied by report no. 5111589160 dated 14 January 2010 from the GIA Gemological Institute of America stating that the diamond is natural Fancy Intense Yellow colour, VVS1 clarity

An important coloured diamond ring.  photo: Christie's Images Ltd 2010

The square-shaped Fancy Light Yellow diamond weighing 34.03 carats to the micro pavé-set diamond gallery and bifurcated shoulders to the plain hoop, ring size 6¼. Estimate $300,000 - $500,000  - Price Realized $362,500

Accompanied by report no. 2115019072 dated 6 August 2009 from the Gemological Institute of America (GIA) stating that the diamond is natural Fancy Light Yellow colour, VS2 clarity

An impressive diamond necklace. photo: Christie's Images Ltd 2010

The necklace composed of fifty-six graduated heart-shaped diamonds weighing a total of 60.79 carats, 40.0cm long, clasp engraved "PT950". Estimate $200,000 - $300,000  - Price Realized $242,500

Accompanied by ten reports dated from 16 May 2006 to 25 August 2008 from the Gemological Institute of America (GIA) with the following details:

16415045 18 December 2007 J SI2 2.76 Heart
17459422 22 July 2008 J I1 3.27 Heart
17199636 13 May 2008 J VS2 2.01 Heart
17479411 25 August 2008 J VS2 1.00 Heart
17479408 25 August 2008 J VS2 1.02 Heart
16800665 29 January 2008 K VS1 3.29 Heart
17237990 13 June 2008 L VS2 1.14 Heart
17479523 22 August 2008 L SI1 1.35 Heart
16866696 3 March 2008 L VS1 3.15 Heart
15149873 16 May 2006 L SI1 2.42 Heart

A pair of important emerald and diamond ear clips. photo: Christie's Images Ltd 2010

Each mounted with a rectangular-shaped emerald weighing 16.30 and 15.69 carats to the brilliant-cut diamond surround, 2.5cm long, 2.3cm wide, each stamped "PT950". Estimate $140,000 - $180,000  - Price Realized $218,500

Accompanied by reports no.0801007 and 0801008 dated 8 January 2008 from the Gübelin Gem Lab stating that the emeralds are natural, of Colombian origin, 16.30 carat with indications of moderate clarity enhancement, 15.69 carat with minor clarity enhancements

An impressive diamond necklace. photo: Christie's Images Ltd 2010

The ring mounted with a brilliant-cut diamond weighing 16.13 carats, to the plain hoop, ring size 6¼. Estimate $150,000 - $180,000  - Price Realized $182,500

An unusual sapphire, diamond and emerald ring, by Manuel Bouvier. photo: Christie's Images Ltd 2010

The cushion-shaped sapphire weighing 65.17 carats to the pear-shaped diamond shoulders weighing a total of 2.87 carats within a pavé-set emerald surround to the similarly set gallery and bifurcated hoop, ring size 6¾, stamped "750". With maker's mark for Manuel Bouvier. Estimate $45,000 - $55,000  - Price Realized $164,500

Accompanied by report no. GRS2008-091669 dated 13 September 2008 from the GRS Gem Research Swiss Lab stating that the sapphire is Burmese (Mogok, Pain Pyit) origin, no indication of thermal treatment

Accompanied by report no. 08008287002 and 08008287003 from HRD Diamond High Council, Antwerp (HRD) stating that the diamonds are I colour, VS1 and VS2 clarity

An impressive emerald diamond and mother-of-pearl bracelet, by BOGH-ART. photo: Christie's Images Ltd 2010

Of marquetry design, the wide band composed of five graduated panels of floral design, each mounted with an oval-shaped emerald weighing a total of 19.35 carats within a surround of pavé-set diamonds, circular-shaped emeralds and mother-of-pearl, to the similarly set trefoil spacers with rose-cut diamond accents and diamond rondelles, the hook and chain clasp suspending an oval-shaped emerald within a diamond surround of similar motif, in maker's presentation box, with maker's certificate, 11.1cm long, stamped "750". With maker's mark for Bogh-Art, no. BRT 198. Estimate $100,000 - $120,000  - Price Realized $158,500

Notes: For the past 100 years, with four generations of passion and expertise in gems and high-end jewellery, the Boghossian family have been creating unique jewellery pieces for a selective and demanding clientle. In 2008, Albert Boghossian, together with two nephews Roberto and Ralph, created BOGH-ART, an Haute Joaillerie line that combines precious stones with audacious and innovative designs. BOGH-ART is famed for its revival of the ancient art of "inlay", a decorative technique of setting a stone directly into another stone, to form patterns and pictures that are seamlessly set within the matrix. Each stone is delicately shaped, sculpted, and carved out to the most exacting standards and measurements, an expertise inspired by the finest watch making tradition. BOGH-ART exclusive jewels blend beautiful colours with extremely fine craftsmanship resulting in unique and exquisite sophistication.
This highly delicate emerald and mother of pearl bracelet is reminiscent of the delicate Art of Marquetry, a craft highly appreciated and developed in the Middle East. This intricate expertise consists of covering a structure with pieces of veneer - generally woods, ivory, tortoiseshell, mother-of-pearl, or fine metals. Usually applied to furniture or decorative objects, Bogh-Art skillfully translated this technique to jewellery.

An elegant diamond necklace.  photo: Christie's Images Ltd 2010

The necklace designed as a fringe of marquise and brilliant-cut diamonds of floral motif, centring upon a similarly set pear-shaped diamond drop weighing 2.36 carats, to the line of graduated brilliant-cut diamonds, joined by a similarly set clasp suspending a brilliant and marquise-cut diamond, 38cm long. Estimate $130,000 - $150,000  - Price Realized $146,500

Accompanied by report no. 2105173113 dated 8 September 2008 from the Gemological Institute of America stating that the pear-shaped diamond weighing 2.36 carats is D colour, VS1 clarity

Accompanied by report no. 5101172797 dated 4 September 2008 from the GIA Gemological Institute of America stating that the marquise-shaped diamond weighing 1.23 carats is F colour, VS2 clarity

A diamond pendent necklace, by Nsouli. photo: Christie's Images Ltd 2010

The necklace composed of a double-row of graduated pear-shaped diamonds weighing a total of 46.13 carats to the suspended pear-shaped diamond pendant weighing a total of 7.24 carats, of semi-flexible design, 42.0cm long, stamped "750". The necklace signed Nsouli. Estimate $120,000 - $130,000  - Price Realized $146,500

Accompanied by report no. 09018787001 dated 20 October 2009 from HRD Antwerp Institute of Gemmology stating that the pear-shaped diamond pendant is J colour, VS1 clarity

A suite of sapphire diamond and pearl jewellery.  photo: Christie's Images Ltd 2010

Comprising a necklace mounted with fifteen oval-shaped cabochon sapphires each with pavé-set diamond cap suspended from a line of pavé-set diamond barrel-shaped links, with opposing pearl and sapphire bead accents to the circular pavé-set diamond terminals and five row sapphire bead backchain; with matching bracelet, ear pendants and ring, the sapphires weighing a total of 587.66 carats, the diamonds weighing a total of 24.38 carats, necklace 43.0cm long, bracelet 17.5cm long, ear pendants 5cm long, ring size 6¼, stamped "PT900" and "18K". Estimate $65,000 - $75,000  - Price Realized $146,500

Accompanied by report no. 5111691249 dated 8 February 2010 from the Gemological Institute of America (GIA) stating that the ring contains a sapphire of Burmese origin, with no indications of heating (4)

Christie's. Jewels and Watches: The Dubai Sale. 28 April 2010. Jumeirah Emirates Towers Hotel www.christies.com