Emerald and Diamond Upswept Ring by Canturi

18ct white gold, emerald and diamond 'Upswept' ring, 2018,…
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18ct white gold, emerald and diamond 'Upswept' ring, 2018, claw-set to the top with a square mixed-cut emerald weighing 6.80 carats, each shoulder end-set with a graduated line of five emerald-cut diamonds together weighing 3.84 carats, the bridge accented to each side with a baguette-cut diamond together weighing 0.14 carat, size J, signed Canturi, numbered 527448. Accompanied by: A GSL report numbered AA60416, dated 29 March 2018, stating that the 6.80 carat gemstone is natural emerald, of Zambian origin, moderate oil treatment;. GIA diamond dossiers numbered 7276768862, 7276947734, 7286254023 and 2277803402, dated 18 January 2018, 5 February 2018, 28 February 2018 and 22 January 2018, stating that the 0.71 carat, 0.70 carat, 0.51 carat and 0.51 carat diamonds are F, F, F and F colour, VVS1, VS2, VVS2 and VS1 clarity respectively, all laser inscribed. Provenance: Canturi, Sydney, acquired on 19 October 2018, $76,000. Other Notes: property from Melissa Louise Caddick (Receivers Appointed), Sydney

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  • Claw Set Jewellery - The description "claw set" in jewellery refers to a setting where the gemstone is held in place by metal prongs that resemble claws. These prongs are bent over the edges of the gemstone to secure it in the setting. This type of setting is commonly used for diamonds and other precious stones.

  • Emeralds - Emeralds have been used in jewellery making for thousands of years, and are prized for their deep green colour, which is caused by the presence of chromium and vanadium in the mineral beryl. Because of their rare colour, emeralds are often more valuable than diamonds of a similar size and quality. In jewellery making, emeralds are typically cut into round or oval shapes to maximize their color and clarity. They are often set in gold or platinum and used as the centrepiece of a piece of jewellery, such as a ring or necklace. They can also be used in combination with other gems, such as diamonds, to create intricate and beautiful designs.
  • 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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