Aquamarine and Diamond Ring by Canturi
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18ct white gold, aquamarine and diamond 'Upswept' ring, Canturi, 2018, claw-set to the top with an emerald-cut aquamarine weighing 9.42 carats to shoulders each claw-set with a trapezoid-cut diamond, the diamonds together weighing 0.47 carat, size J, signed Melissa 2 by S Canturi, numbered 527799. Accompanied by a GSL gemstone summary numbered AA60845/2, dated 21 June 2018, stating that the 9.42 carat gemstone is natural aquamarine. Provenance: Canturi, Sydney, acquired on 4 October 2018, $15,500. 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.
- 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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