• WordNet 3.6
    • n carat the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold
    • n carat a unit of weight for precious stones = 200 mg
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The most expensive perfume in the world is Parfum VI, which was made by Arthur Burnham. A 4 inch bottle which is covered with diamonds and 24-carat gold costs $71,380
    • Carat A twenty-fourth part; -- a term used in estimating the proportionate fineness of gold.
    • Carat The weight by which precious stones and pearls are weighed.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The largest diamond that was ever found was 3106 carats.
    • n carat An old weight equal to a scruple, or the twenty-fourth part of an ounce troy.
    • n carat A unit of mass formerly used in various countries for weighing gold. It was generally the 24th part of a mark of gold, and was subdivided into 12 grains. It was commonly equal to about 150.5 troy grains.
    • n carat Hence A twenty-fourth part: specifically used in expressing the fineness of gold when used as jewelry. Thus, pure gold being considered as 24 carats fine, if two, six, or ten twenty-fourths of alloy (commonly copper or silver) is present, the gold is said to be 22, 18, or 14 carats fine, and so on. The gold used by jewelers is seldom over 18 carats fine, except in wedding-rings, the standard fineness of which is 22 carats. Gold of 18 carats fine is almost invariably used in mounting diamonds, while 14-carat gold is said to be ordinarily used in the United States for gold chains, etc.
    • n carat A unit of weight for precious stones, divided by jewelers into 4 grains, called diamond-grains, but equal to about 3⅙ troy grains, 151½ English carats being taken as equal to an ounce troy. In 1877 the weight of the carat was fixed by a syndicate of London, Paris, and Amsterdam jewelers at 205 milligrams, or 151.76 carats to the troy ounce. Under the translated form κεράτιον, or ceratium, siliqua was adopted by Constantine into the system of weights of the empire as of an ounce, equal to 189 milligrams. In Italy it remained as a part of the system of weights, in general with the same relation to the ounce and with nearly the same value. The Arabic qirat was the 24th part of the mithkal, and was subdivided sometimes into 4, sometimes into 3 grains, its value for gems being very nearly 3 grains troy. The Castilian carat, of a Castilian ounce, or 3.164 troy grains, was, like the rest of the Castilian system, adopted from the Arabs. From Spain this has passed to the rest of Europe and to America, with only small modifications, less than unlegalized units commonly undergo under the name of the Amsterdam or diamond carat, which is usually divided into 64ths. Pearls are sold by the diamond-grain and not by the carat, while small baroque pearls, coral, rough garnets, and the inferior kinds of stones are sold by the ounce troy. The subdivisions of the carat are always expressed in fourths, eighths, sixteenths, etc.
    • n carat Often abbreviated car. or K.
    • carat To try or refine (gold).
    • n carat An Arabian coin of base silver, current in Mecca, Medina, and Mocha.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: Less than 1% of the women in the world will ever be able to wear a diamond that is the size of a carat or more
    • n Carat kar′at a weight of 4 grains: a proportional measure of 1⁄24 in stating the fineness of gold.
    • ***


  • Robert Graves
    Robert Graves
    “The award of a pure gold medal for poetry would flatter the recipient unduly: no poem ever attains such carat purity.”


Webster's Revised Unabridged Dictionary
F. carat,cf. It. carato, OPg. quirate, Pg. & Sp. quilate,), Ar. qīrāt, bean or pea shell, a weight of four grains, a carat, fr. Gr. kera`tion a little horn, the fruit of the carob tree, a weight, a carat. See Horn
Chambers's Twentieth Century Dictionary
Fr.,—Ar. qīrāt, perh. from Gr. keration, a seed or bean used as a weight.


In literature:

Women is reg'lar eight-teen-carat goold.
"Capt'n Davy's Honeymoon 1893" by Hall Caine
They're Simon-pure, dyed-in-the-wool, eighteen-carat men.
"'Drag' Harlan" by Charles Alden Seltzer
There are twenty-five stones, each weighing over six carats.
"Boy Scouts in the Canal Zone" by G. Harvey Ralphson
The standard worth of the gold is 21 carats; that of the silver 20 grains.
"Travels in Peru, on the Coast, in the Sierra, Across the Cordilleras and the Andes, into the Primeval Forests" by J. J. von Tschudi
It weighs 1,880 carats.
"One Thousand Secrets of Wise and Rich Men Revealed" by C. A. Bogardus
Its original weight was nearly 800 carats.
"A History of the Nineteenth Century, Year by Year" by Edwin Emerson
The mob plans to retail them for $25 a carat!
"Mars Confidential" by Jack Lait
Nick rapped on the counter with his six-carat diamond ring.
"Satan and the Comrades" by Ralph Bennitt
A gold worker would have to mix at least three carats of silver with him before he would be malleable.
"Timar's Two Worlds" by Mór Jókai
But examine it, and you will find that it bears a tolerable imitation of an eighteen-carat hall-mark.
"Scotland Yard" by George Dilnot

In news:

Last year that gave the jeweller the first right of refusal for up to 100 per cent of the production of rough diamonds from Krone-Endora at Venetia, excluding individual stones of 10.8 carats or greater.
1.5 carat meal: Man swallows diamond in Sri Lanka.
On Sunday afternoon the couple found a flawless, 2.44-carat white diamond at the park.
The wedding ring is shown with Kardashian's 20.5-carat engagement ring in a photograph from the entertainmentwise website.
Carat and iProspect have won the £10 million consolidated digital media account for the supermarket chain Asda.
Carat and iProspect will work on the £10m digital account.
Dense-media separationprocessing of 20,28 t of kimberlite, collected last year as a single surface sample from the outcropping Q1 kimberlite, had returned a total of 6,08 carats of diamonds , which indicated a diamond content of 30 ct/100 t.
3-carat, $14k diamond ring stolen from Westfield Franklin Park.
In a typical recent piece he set a ring with antique Hellenistic wooden beads, coated in 18-carat gold.
Fashionable 24-Carat gold tattoo.
Tattoos are forever, but if you don't want to go the full Monte, Christian Dior has the perfect idea for you 24-Carat gold temporary tattoos.
For a gift with lasting value, consider the competing diamonds, each weighing more than 30 carats, on the auction block at Christie's and Sotheby's in early December.
The Olympics could prove to be a period of exceptional value for brands thinking about using national newspapers, write Mark Jones, press manager, Carat, and Keith Perry, group sport managing editor, The Daily Telegraph.
This diamond and 18K white gold dragonfly necklace features an 18 chain and.44 total carats.
Channel 4, Carat and Kellogg 's in real-time dual screen prize giveaway.

In science:

Given a number k , a cube has k carats along a dimension if the aggregate of every slice along that dimension is at least k .
Diamond Dicing
Note that if a dimension has k carats, it necessarily has k (cid:48) carats for k (cid:48) < k .
Diamond Dicing
For monotonically non-decreasing operators (e.g., COUN T, MAX or SUM over nonnegative measures), union preserves the carat, as the next proposition shows.
Diamond Dicing
Finding κ for COUN T-based Diamonds Using Proposition 3.2, the κ-carat diamond was built for each of the data sets.
Diamond Dicing
The estimate of κ comes from Proposition 3.2 and the number of iterations recorded is the number used by Algorithm EMD to compute the κ-carat diamond given κ.
Diamond Dicing