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 ?
Despite the steady increase in pricing achieved during the course of the year on a quarter by quarter basis, it is likely that the annual average price for the fiscal year ending December 31, 2017 will fall below Stornoways 2017 pricing guidance of US$100 to US$132 per carat given the outlook for the rough diamond market for the remainder of the year.
For example, we find that buyers are willing to pay premiums upward of 18% for a diamond that is one-half carat rather than slightly smaller than one-half carat and between 5% and 10% for a one-carat diamond rather than a slightly less than one-carat diamond.
Competent eligible Princes should call The Pink Emerald Company today (1 800 833-GEMS) for a private consultation regarding "The 169 Carat Pink Passion" because Cupid's arrival is only a month away and your Princess is counting on your exquisite taste and unparalleled stellar performance, as usual.
The Catoca mine produced 620,500 carats of diamond, while the production rates of Camatue, Cuango, Chitotolo, Calonda, Somiluana, Luo and Lulo respectively stood at 41,200, 39,700, 20,000, 12,800, 9,000, 8,700 and 808 carats.
Dr Nyashanu said, "Since production started in March, we produced 218 278 carats, 222 528 carats in April and 72 563 carats in May.
Murowa had processed 542 000 tonnes of ore during the assessed period, in comparison with 473 000 tonnes in 2011, while overall retrieval of diamonds grew to 403 000 carats from 367 000 carats in 2011.
The Paris Hilton Limited Edition Cotton Candy Watch features a 50mm solid 18kt rose gold with approximately nine carats and 1026 stones of WS1 near colorless white diamonds.
In this, Trans Hex sold 4,303 carats rough diamonds with an average price of $439 per carat.
Recent results from the Peregrine DO-27 Pipe were released with 136 carats recovered from 151.
9 carats were recovered from colluvial gravels and soils that were excavated immediately downslope from the Brauna 3 kimberlite.
22 carats per cubic metre for a total of approximately 45,000 carats in the indicated category.
DIOS EXPLORATION is pursuing the search for the sources of the outstanding kimberlitic indicator minerals dispersal trains on 33 CARATS.