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Chemistry > Gold Alloys


Page location: Info Library> Chemistry > Gold Alloys
The gold in jewellery is never pure gold, it is an alloy of gold and another metal. The table below shows the most common gold alloys used in jewellery and other applications and the metals used to make them.

Color of Gold Alloy Composition
Yellow Gold (22K) Gold 91.67%
Silver 5%
Copper 2%
Zinc 1.33%
Red Gold (18K) Gold 75%
Copper 25%
Rose Gold (18K) Gold 75%
Copper 22.25%
Silver 2.75%
Pink Gold (18K) Gold 75%
Copper 20%
Silver 5%
White Gold (18K) Gold 75%
Platinum or Palladium 25%
White Gold (18K) Gold 75%
Palladium 10%
Nickel 10%
Zinc 5%
Gray-White Gold (18K) Gold 75%
Iron 17%
Copper 8%
Soft Green Gold (18K) Gold 75%
Silver 25%
Light Green Gold (18K) Gold 75%
Copper 23%
Cadmium 2%
Green Gold (18K) Gold 75%
Silver 20%
Copper 5%
Deep Green Gold (18K) Gold 75%
Silver 15%
Copper 6%
Cadmium 4%
Blue-White or Blue Gold (18K) Gold 75%
Iron 25%
Purple Gold Gold 80%
Aluminum 20%