How do jewelers use alloys to obtain different visual Gold colors?
18k and 14k Yellow Gold is Gold alloyed with copper, silver, zinc 14k and 18k White Gold is Gold alloyed with copper, nickel, zinc Red Gold (or Rose) is Gold alloyed with just copper Green Gold (you hardly see it ever used) is Gold alloyed with just silver Adjusting the proportions of coloring metal agents shown above provides the array of colors on the market.