What is an Alloy?
An alloy is a combination of metals or a combination of one or more metals with non-metallic elements. Here is a table of gold alloys and their compositions.
| 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% |
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