Sunday, November 20, 2011
Gold Alloys
10:04 AM | 
Posted by
bayan |
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 zinc. Gold is of course yellow and the various colours seen such as red, white and green are simply alloys of gold. The final colour is dependent on the ratios and type of alloys added. |
Typical mixes:
| Carat and Colour | Pure 24ct | Silver | Copper | Zinc | Nickel |
| 9ct Yellow gold | 37.5% | 12.1% | 44.4% | 6% | NIL |
| 9ct white gold | 37.5% | NIL | 34.0% | 10.8% | 17.7% |
| 14 ct Green gold | 58.33% | 32.5% | 8.97% | 0.2% | NIL |
| Carat | Silver | Copper | Colour Produced |
| 9 ct | 62% | NIL | White |
| 9 ct | 55.0 | 7.5 | Pale yellow |
| 9 ct | 42.5 | 20.0 | Yellow |
| 9 ct | 31.25 | 31.25 | Rich yellow |
| 9 ct | 20.0 | 42.5 | Pink |
| 9 ct | 7.5 | 55.0 | Red |
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