Cartier Sapphire and Diamond Flower Necklace with Tassel

18ct gold, sapphire, diamond, amethyst and citrine necklace,…
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18ct gold, sapphire, diamond, amethyst and citrine necklace, monture Cartier, set to the front with a flower motif centring a cushion-shaped mixed-cut yellow sapphire weighing 12.24 carats surrounded by petals pave-set with circular-cut diamonds, connected by a polished amethyst bead to a tassel of multiple strands of amethyst beads accented by polished gold spheres and topped with a semi-spherical cap pave-set with diamonds; to a torsade necklace in the same style completed by a clasp set with a rectangular step-cut citrine flanked by brilliant and square-cut diamonds, inner circumference approximately 450 mm, tassel length approximately 115 mm, necklace signed Monture Cartier, numbered R8444, French assay mark, flower signed Cartier and numbered 10671, tassel detachable, flower a later addition. Accompanied by an Agl Prestige gemstone report numbered 1102910, dated 21 August 2019 stating that it is the opinion of the laboratory that the origin of the 12.24 carat natural yellow sapphire would be classified as Ceylon (Sri Lanka) and that no thermal or clarity enhancement has been detected.

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  • Assay / Assayed - Assaying is the testing of a metal, most commonly silver and gold to determine its ingredients and quality. In Britain, once an item of silver or gold has been assayed, a mark is stamped on it, certifying its purity. Known as hallmark, it derives its name from the Guild Hall of the Goldsmiths' Company, who recieved its Charter in 1327 giving it the power to assay and mark articles of gold and silver.
  • 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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