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carat    音标拼音: [k'ɛrət]
n. 克拉

克拉

carat
n 1: a unit of weight for precious stones = 200 mg
2: the unit of measurement for the proportion of gold in an
alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold
[synonym: {karat}, {carat}, {kt}]

Carat \Car"at\ (k[a^]r"[a^]t), n. [F. carat (cf. It. carato,
OPg. quirate, Pg. & Sp. quilate), Ar. q[imac]r[=a]t 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}.]
1. The weight by which precious stones and pearls are
weighed.
[1913 Webster]

Note: The carat equals three and one fifth grains Troy, and
is divided into four grains, sometimes called carat
grains. Diamonds and other precious stones are
estimated by carats and fractions of carats, and
pearls, usually, by carat grains. --Tiffany.
[1913 Webster]

2. A twenty-fourth part; -- a term used in estimating the
proportionate fineness of gold.
[1913 Webster]

Note: A mass of metal is said to be so many carats fine,
according to the number of twenty-fourths of pure gold
which it contains; as, 22 carats fine (goldsmith's
standard) = 22 parts of gold, 1 of copper, and 1 of
silver.
[1913 Webster]


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  • Carat (mass) - Wikipedia
    The carat (ct) is a unit of mass equal to 200 mg (0 00705 oz; 0 00643 ozt), which is used for measuring gemstones and pearls The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, [1] [2] and soon afterwards in many countries around the world
  • CARAT Definition Meaning - Merriam-Webster
    The meaning of CARAT is a unit of fineness for gold equal to 1 2₄ part of pure gold in an alloy Frequently Asked Questions About carat
  • Diamond Carat: What Is Diamond Carat? | Tiffany Co. US
    What Is a Diamond Carat? Carat denotes the weight of a diamond, not the size Tiffany measures diamonds to 1 1000th of a carat; one carat equals 20 grams Tiffany diamonds are always cut to maximize beauty, not carat weight
  • Karat vs Carat – Difference Between Karats and Carats
    Carat vs Karat: A carat is a unit of gemstone mass equal to 200 mg, while a karat is a measure of gold purity (photos: Mario Sarto, Agnico-Eagle) The terms karats and carats both refer to bling in the jewelry trade and in geology, but the two words don’t mean the same thing
  • Carat | Weight, Measurement, Jewelry | Britannica
    carat, unit of weight for diamonds and certain other precious gems Before 1913 the weight of a carat varied in different gem centres Originally based on the weight of grains or leguminous seeds, which, of course, varied in size from place to place, the carat was equivalent to 0 2053 gram (3 168 troy grains) in London , 0 1972 g in Florence
  • CARAT | English meaning - Cambridge Dictionary
    CARAT definition: 1 a unit for measuring the weight of jewels (= precious stones) 2 a unit for measuring how pure… Learn more
  • Carat vs Karat: What Are They And What Are They Used For . . .
    A carat is a unit of weight for gemstones, not a unit of size One carat is equal to 200 milligrams or 0 2 grams (0 000440925 pounds) In jewelry, the higher the carat usually the higher the





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