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Answer: Why is gold measured in carats? > World Gold Council, the information resource for gold, investment, jewellery, science and technology, historical and culture

 

Frequently Asked Questions

Why is gold measured in carats?

This stems back to ancient times in the Mediterranean /Middle East, when a carat became used as a measure of the purity of gold alloys (see next Question 5). The purity of gold is now measured also in terms if fineness, i.e parts per thousand. Thus 18 carats is 18/24th of 1000 parts = 750 fineness.
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