Question

Why are metals sometimes added to gold?

Answer 1

Adding copper to gold makes it redder and adding silver, zinc and any other metal makes gold paler. ... As mentioned earlier, for most uses of gold the pure metal is too soft on its own and is therefore hardened by the addition of alloying elements, copper, silver, nickel, palladium and zi

Answer 2

Gold as such is soft, and in order to improve hardness it is mixed with another metal, such as nickel, copper, palladium, zinc, etc. ... Based on the composition of the mixture that is the percentage of gold in the mixture, the number of karats is determined, which also means the value of gold itself. Hope I helped!