<P> Various ways of expressing fineness have been used and two remain in common use : millesimal fineness expressed in units of parts per 1,000 and karats used only for gold . Karats measure the parts per 24 , so that 18 karat = ⁄ = 75 % and 24 karat gold is considered 100 % gold . </P>
<P> Various ways of expressing fineness have been used and two remain in common use : millesimal fineness expressed in units of parts per 1,000 and karats used only for gold . Karats measure the parts per 24 , so that 18 karat = ⁄ = 75 % and 24 karat gold is considered 100 % gold . </P>
the ratio of pure gold in 24 carat gold is
the ratio of pure gold in 24 carat gold is
100 % gold
100 % gold