brilliant-cut diamond

A magnificent diamond single-stone ring, circa 1940. Estimate: £150,000 - 200,000. photo courtesy Bonhams A magnificent late art deco diamond ring is the highlight of the Bonhams Fine Jewellery sale which will take place in New Bond Street on September 22nd. The Asscher-cut diamond, weighing 6.82 carats, is D colour, potentially flawless and Type IIa. Type IIa diamonds are the most chemically pure type of diamond and possess exceptional optical transparency. Famous gem diamonds that are Type IIa include the Cullinan I... [Lire la suite]

A ruby and diamond panther brooch. photo Bonhams Modelled as a crouching panther, the body pavé-set with brilliant-cut diamonds and lozenge-shaped ruby spots, the eyes set with circular-cut emeralds, wearing a calibré-cut ruby collar, mounted in 18 carat yellow gold, rubbed maker's mark, UK import marks, length 7.1cm. Estimate: £4,000 - 6,000 Bonhams. Fine Jewellery, 21 Apr 2010. New Bond Street www.bonhams.com

An impressive natural pearl necklace. Designed as a double row of graduating natural pearls, measuring 5.8-12.8mm. in diameter, to a polished bar clasp, length of shortest row 39.0cm. Sold for £311,200 inclusive of Buyer's Premium. Photo courtesy Bonhams Bonhams' London jewellery department has had their most successful year ever. The recent sale, The Art of Jewels: Fine Jewellery and Iconic Gems, proved the enduring attraction of rare and beautiful jewelled items, despite the economic downturn. The sale achieved £2.2 million... [Lire la suite]

An emerald and diamond brooch/pendant © 2002-2009 Bonhams 1793 Ltd The central cushion-shaped emerald, weighing 18.85 carats, within a border of brilliant-cut diamonds, suspended from a marquise-cut diamond three-stone surmount, on a fancy-link chain necklace with brilliant-cut diamond three-stone clasp, diamonds approximately 4.30 carats total, detachable brooch and pendant fittings, brooch length 2.7cm., necklace length 39.2cm. Sold for £57,600 Accompanied by a certificate from Gübelin.Provenance: John Francis Caradoc... [Lire la suite]

A spectacular "D-Flawless" unmounted brilliant-cut diamond weighing 28.88 carats. photo Sotheby's Estimate: 29,000,000—35,000,000 HKD - Sold 36,500,000 HKD NOTE: Accompanied by GIA report numbered 5101839274, dated 27 August 2009, stating that the 28.88 carat diamond is D colour, Flawless clarity, with Excellent Cut, Polish and Symmetry; with additional diamond type classification report stating that this diamond has been determined to be a Type lla diamond. Type lla diamonds are the most chemically pure type of... [Lire la suite]

A fine aquamarine, sapphire and diamond sautoir, by Cartier, circa 1920. Sold for £216,000 © 2002-2009 Bonhams 1793 Ltd Yesterday's jewellery sale at Bonhams New Bond Street demonstrated that for high quality fine jewellery a phenomenal price can be commanded, with the one Cartier sautoir being sold for £216,000 from the pre-sale estimate of £15,000- £20,000. The vertically aligned pendant set with two step-cut aquamarines, the largest cut-cornered stone to the centre, connected by cabochon sapphire and brilliant and single-cut... [Lire la suite]

A brilliant-cut diamond ring The brilliant-cut diamond within a calibré-cut sapphire surround, with French assay mark for platinum and maker's mark. Estimate £6,000 - £8,000 - Price Realized £25,000 ($40,875).Christie's. Jewellery. 10 June 2009. London, King Street www.christies.com 

A demantoid garnet and diamond ring The cushion-shaped demantoid garnet weighing 4.09 carats within a two tiered brilliant-cut diamond surround and half-hoop. Estimate £10,000 - £12,000 ($16,160 - $19,392) - Price Realized £12,500 ($20,200) Christie's. Jewellery. 10 June 2009. London, King Street www.christies.com

A diamond single-stone ring The brilliant-cut diamond weighing 5.34 carats to the raised claw setting and plain hoop. Estimate £25,000 - £30,000 ($39,575 - $47,490) A diamond single-stone ring The brilliant-cut diamond weighing 5.00 carats to the plain mount. Estimate £20,000 - £25,000 ($31,660 - $39,575) Christie's. Jewellery. 10 June 2009. London, King Street www.christies.com

A gem-set ring The oval-cut pink tourmaline, within a mount applied with butterfly and floral motifs, set throughout with circular-cut pink and yellow sapphires and brilliant-cut diamonds, mounted in 18k rose gold, pink tourmaline approximately 24.00 carats, ring size 7. Sold for HK$38,400 Bonhams. Fine Jewellery and Jadeite and Modern Wristwatches, 21 May 2009. Island Shangri-La Hong Kong Hotel, Admiralty, Hong Kong www.bonhams.com