18ct white gold and diamond 'Regina' ring, Canturi, the square modified brilliant-cut diamond weighing 2.01 carats is claw-set to shoulders partially set with brilliant-cut diamonds and a diamond-set gallery, the smaller diamonds together weighing approximately 0.58 carat, size L, signed Canturi, recently rhodium plated. Accompanied by a GIA report check numbered 1106846352, dated 22 June 2009, stating that the 2.01 carat diamond is F colour and VS2 clarity;. a facsimile Canturi appraisal numbered BV3712745, dated 5 April 2022 and a Canturi box.
- 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.
- 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.
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