carat

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carat

1. a measure of the weight of precious stones, esp diamonds. It was formerly defined as 3.17 grains, but the international carat is now standardized as 0.20 grams
2. a measure of the proportion of gold in an alloy, expressed as the number of parts of gold in 24 parts of the alloy

Carat

 

a unit of weight, abbreviated kar. in Russian and ct internationally, which is used in the jewelry trade for measuring the weight of precious stones and pearls. The carat is used in a number of countries to indicate the purity of precious metal alloys. The metric carat, which was established by the fourth General Conference on Weights and Measures (Paris, 1907) and adopted in the USSR in 1922, is equivalent to 200 mg (exactly) or 2 X 104 kg.

carat

[′kar·ət]
(lapidary)
A unit of weight of gemstones, equal to 200 milligrams. Also known as metric carat.
References in periodicals archive ?
Lulo and Mothae produce large and high-value diamonds, with >75% of revenues from both mines generated from the recovery of +4.8 carat stones.
Handcrafted in northern Spain this 18k white gold cuff bracelet is adorned with 8.9 carats of pave-set diamonds and 12.23 carats of pyramid-shaped blue topaz layered over mother of pearl, $17,900
Dapples of light enhance the glimmer of a diamond bee pin ($3.450) of two-tone 19K gold and 2.75 carats of diamonds from Shrode Jewelers, 1433 Main St., (941) 365-4234.
In this case, the size and location of the damage was as "fortunate," as such damage can be--resulting in a recut gem with a somewhat minimal loss of weight (of less than a carat).
Danube necklace with briolette-cut diamonds (28.36 carats) and aquamarines (418.20 carats) set in a platinum, Cartier.
The Cullinan Mine is renowned for the discovery of the largest rough gem diamond ever found at 3106 carats and is now form part of the Crown Jewels in the Tower of London.
The mine earned its place in history with the discovery of the Cullinan diamond in 1905, the largest rough gem diamond ever found at 3,106 carats. This iconic stone was cut into the two most important diamonds which form part of the Crown Jewels in the Tower of London - the First Star of Africa, which is mounted at the top of the Sovereign's Sceptre and which at 530 carats is the largest flawless cut diamond in the world, and the Second Star of Africa, a 317 carat polished diamond which forms the centrepiece of the Imperial State Crown.
Sotheby's announced that it will offer "a magnificent oval diamond of supreme importance" in its Hong Kong auction of Magnificent Jewels and Jadeite on October 7, which is expected to fetch US$ 28-35 mln, more than the 101.73 carats Winston Legacy, a pear shape, D colour, flawless diamond sold by Christie's Geneva for US$26.7 mln earlier this year.
As of January 1, 2012, JORC-compliant reserves stood at 631m carats, with an average grade of 1.31 carats per ton, and the resources at 968m carats, with an average grade of 1.31 carats per ton.
The largest cut white (D) diamond by weight is the 1991 modified heart-shaped 273.85 carats (54.77g) Centenary Diamond.
The Dubai Diamond Exchange (DDE) said the volume of diamonds traded during the first half in the emirate rose 57 per cent to hit 206.1 million carats compared to 131 million carats last year.
Summary: DUBAI -- Dubai Diamond Exchange, or DDE, on Saturday said diamond trade hit new record in first half as trading volumes surged 57 per cent to 206.1 million carats from 131 million carats.