This strength makes gold an excellent choice for a ring setting. Common gold alloys are silver, copper, nickel, and zinc.
Gold color is determined by the percentage of alloys that are included in the metal.
When gold is alloyed with silver, copper, and zinc, the shade of color will vary. When gold is alloyed with nickel, copper, and zinc, it becomes white gold. Yellow gold and white gold have very similar strength and malleability. White gold looks very similar to platinum, but the two have very different properties and prices. The purity of gold is measured in karats, which are expressed in 24ths.