What is the purity of gold defined in?
Gold purity is defined in both millesimal fineness and karats. Millesimal fineness is a system of expressing the purity of gold, silver, and platinum alloys in parts per thousand by mass.
Gold purity is defined in both millesimal fineness and karats. Millesimal fineness is a system of expressing the purity of gold, silver, and platinum alloys in parts per thousand by mass.