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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
    An 'international carat' of 205 milligrams was proposed in 1871 by the Syndical Chamber of Jewellers, etc , in Paris, and accepted in 1877 by the Syndical Chamber of Diamond Merchants in Paris
  • Carat Global Media Marketing Agency | Carat
    We're Carat, the #1 Global Media Network Present in 100 countries delivering marketing strategies Explore our services, culture, leadership more
  • CARAT Definition Meaning - Merriam-Webster
    Precious stones are weighed in carats; a single carat is equal to 200 milligrams Carat is also a variant spelling of karat, which measures the purity (but not the weight) of gold
  • About Diamond Carat Weight | Gemological Institute of America . . .
    Diamond weights greater than one carat are expressed in carats and decimals A 1 08 carat stone would be described as 'one point oh eight carats ' All else being equal, diamond price increases with carat weight, because larger diamonds are more rare and more desirable
  • Diamond Size Chart: MM vs Carat Comparison - BlueStone Blog
    Carat is a weight unit for gemstones and diamonds One carat is equivalent to 200 milligrams, roughly the weight of a tiny paperclip It’s not necessarily size, but the heavier the diamond, the larger it is although that’s not always true When jewellers say “1-carat diamond”, they mean the weight
  • Is a Karat the Same as a Carat? - HowStuffWorks
    A seed was called a carat, so a stone that weighed one seed was said to weigh a carat The "karat" spelling came later and should only be used when describing gold purity Although you'll sometimes read online a phrase like a "10-karat diamond," this is incorrect It should be a "10-carat diamond " Here are some interesting links:
  • 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





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