Carat (mass) g or possibly up to 5 g less. Therefore, the metric equivalent of 1 "siliqua" was approximately 189 mg. The Greeks had a similar unit of the same value. Gold fineness in carats comes from carats and grains of gold in a solidus of coin. The conversion rates 1 solidus = 24 carats, 1 carat = 4 grains still stand. Woolhouse's "Measures, Weights and Moneys of all Nations" gives gold fineness in carats of 4 grains, and silver in pounds of 12 troy ounces of 20 pennyweight each. Carat (mass) The carat (ct) (not to be confused with the karat,
Carat (mass) different locations. In terms of diamonds, a paragon is a flawless stone of at least 100 carats (20 g). The ANSI X.12 EDI standard abbreviation for the carat is CD. First attested in English in the mid-15th century, the word "carat" comes from Italian "carato", which comes from Arabic "qīrāṭ" قيراط, in turn borrowed from Greek "kerátion" κεράτιον 'carob seed', a diminutive of "keras" 'horn'. It was a unit of weight, though unlikely to have been used to measure gold in classical times. Carob seeds have been used throughout history to measure jewelry, because it was believed that there was