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Symbol: ct / Base data: mass (precious stones). 1 ct = 200 mg
The spread of African customs
Well-known as a unit that expresses the weight of precious stones. The word “carat” originates from carob (locust bean). The weight of this bean is consistent at about 200 mg. When trading, Arabian merchants stuck to the African custom of measuring the delicate weights of precious stones, and it is believed that this led to the widespread use of this practice.
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