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    Sale 1363

    Jewels : The Geneva Sale (Evening Glamour)

    14 May 2008, Geneva

  • Lot 383

    A HIGHLY IMPORTANT COLOURED DIAMOND AND DIAMOND NECKLACE

    Price Realised  

    Estimate On Request

    A HIGHLY IMPORTANT COLOURED DIAMOND AND DIAMOND NECKLACE
    Set with a heart-shaped fancy vivid yellow diamond weighing 21.40 carats and a pear-shaped diamond weighing 2.35 carats, both within a micro pavé-set diamond surround, joined by a spectacle-set diamond tassel, to the matching neckchain, mounted in 18k white gold, 25.0 cm long
    Accompanied by report no. 14805184 dated 26 September 2007 from the GIA Gemological Institute of America stating that the diamond weighing 21.40 carats is Fancy Vivid Yellow colour, Internally Flawless clarity, Excellent polish, Excellent symmetry

    With a diamond type classification note stating that the diamond has been determined to be a type Ia diamond. Type Ia diamonds occurs in a range from near-colourless to yellow and brown. Because of their historic occurence in South Africa, type Ia diamonds are often called 'Cape' diamonds. Today, diamonds of this type have been found in all major diamond-producing regions of the world.'




    And accompanied by report no. 15030236 dated 30 May 2006 from the GIA Gemological Institute of America stating that the diamond weighing 2.35 carats is D colour, Internally Flawless clarity


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    At the end of the nineteenth century, yellow diamonds were most commonly encountered, if at all, in the Cape Province of South Africa. The term 'Cape Diamond'’ became generically employed for stones of a yellow hue, whose colour is created predominantly by clusters of nitrogen impurities within the crystal structure, causing colour centres and absorption lines. In general, these are the diamonds that fall into the fancy light and fancy yellow colour grades. However, in some rarer cases, in stones which make up only 1-2 of all mined diamonds and which are known as Type Ia diamonds, the impurities are much less frequent single nitrogen atoms. In these instances, the saturation of colour may reach an entirely different level of fancy intense or even fancy vivid yellow. Without doubt, vivid is the apogee of colour saturation on the grading scale, being the brightest, liveliest, rarest, and most valuable saturation of any coloured diamond.

    Given the comparative rarity of vivid yellow diamonds, a stone weighing over 20 carats is a remarkable appearance on the market. Furthermore, this magnificent 21.40 carat diamond is not simply a vivid diamond, but one of a noticeably strong and fine saturation, even for a vivid colour grade and has, in addition, an internally flawless clarity with additional polish and symmetry grades both excellent. Within the world of coloured diamonds, one could call this heart-shape perfect.

    Pre-Lot Text

    THE PERFECT YELLOW HEART







    ANOTHER PROPERTY