Hardy Bros Pink Sapphire & Diamond Ring, 3.67ct, Burmese Origin

A mid 20th century pink sapphire and diamond ring, by Hardy…
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A mid 20th century pink sapphire and diamond ring, by Hardy Brothers, the cushion-shaped pink sapphire, weighing 3.67 carats, flanked by brilliant-cut diamond trefoil shoulders, to the plain hoop, signed Hardy Bros. (indistinct) mounted in 18 carat white gold and platinum. Accompanied by a report from the Gem Studies Laboratory (GSL), Australia, stating that the pink sapphire is of Burmese origin, with no indication of heat treatment. Report number AA51522, dated April 28th 2013

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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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