18ct white gold and diamond pendant necklace, J Farren-Price, of cluster design, centring a collet-set round brilliant-cut diamond weighing 2.53 carats, framed by a line of pave-set similarly cut diamonds, completed by a fine four strand trace chain, circumference approximately 17.72 in., pendant signed JFP for J Farren-Price, accompanied by a GSL report numbered AA59655/1, dated 23 October 2017, stating that the 2.53 carat diamond is E colour, SI1 clarity and a J Farren-Price 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.
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