Diamond and Ruby Ring with Gold and Diamonds

18ct white gold, diamond and ruby ring, 2011 centring a…
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18ct white gold, diamond and ruby ring, 2011 centring a collet-set brilliant-cut diamond weighing approximately 0.50 carat and surrounded by invisibly-set tapered baguette rubies, to sculpted shoulders each set with a pair of circular-cut diamonds, size, maker's mark 'Ad'. Accompanied by a facsimile Galerie Valerie Danenberg receipt dated 7 June 2011 and a Galerie Valerie Danenberg box and outer box. Provenance: Galerie Valerie Danenberg, Paris. Private Collection, New South Wales, acquired from the above on 7 June 2011

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  • Carat - A carat (abbreviated "ct") is a unit of measurement used to describe the weight of a diamond or other gemstone, and separately is a unit of measurement used to describe the weight of precious metals such as gold,.

    For gemstones, one carat is equal to 0.2 grams or 200 milligrams. The weight of a diamond is one of the Four Cs (along with cut, colour, and clarity) that are used to determine a diamond's value.

    It is important to note that a diamond's weight does not necessarily correspond to its size. A diamond's cut, which affects how well it reflects light, can make a diamond of a lower weight appear larger than a diamond of a higher weight. Additionally, the carat is not the only factor to determine the value of a diamond, other factors such as clarity, colour and cut are important too.

    In the gold industry, the purity of gold is measured in carats (abbreviated "ct"), with 24 karats being pure gold and lower carat numbers indicating a lower purity level. So, for example, 18 carat gold is 18/24 or 75% pure gold, and 12 carat gold is 12/24 or 50% pure gold.

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