1º_ Unit of mass of 205 milligrams (which today is rounded to 200 mg) for pearls or precious stones. Its symbol is ct. The name was taken from Arabic 1602; 1610; 1585; 1575; 1591; ( quirat "carob") which actually comes from the Greek 954; 949; 961; 945; 964; 953; 959; 957; ( keration "horn, of hard substance") which also named the "seed"; because at first carob seeds were used as a reference to weigh gems, due to the uniformity of their size and weight. 2º_ Unit of purity in precious metals, especially in gold, with the symbol K or kt. It is equivalent to 1/24 of a fine Au in an alloy (p. and. "18k gold" are 18/24 parts, with 1000 parts would have 750 purity). 3º_ Inflection of the verb quilatar ("aquilatar") . See verbs/carat .
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