Maltese Cross Brooch with South Sea Pearl and Gemstones

Trio, 18ct two-tone gold, South Sea pearl and gem-set brooch,…
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Trio, 18ct two-tone gold, South Sea pearl and gem-set brooch, modelled as a Maltese cross, centring a button-shaped South Sea pearl measuring approximately 14.7 mm. Within a surround of brilliant-cut diamonds, pear-cut sapphire and oval rubies cut en cabochon and further brilliant-cut diamonds, the sapphires together weighing approximately 2.00 carat, the rubies together weighing approximately 6.00 carats and the diamonds together weighing approximately 2.20 carats, measuring 42 mm x 42 mm.

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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.
  • Cabochon Cut in Jewellery - A cabochon cut is a type of gemstone cutting where the stone is cut and polished in a convex shape with a flat bottom and a domed top, with no facets. This type of cut is typically used for opaque or translucent stones that have natural patterns or inclusions that are best displayed in this type of cut. Examples of stones that are often cut as cabochons include turquoise, opal, and moonstone.

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