Pure gold, 24kt, is exceptionally soft and not suitable for jewellery making. Alloy metals used give pure gold stability so that it can be made into beautiful lasting jewelry. Beyond the strengthening purpose, alloying allows for colored gold. The most common colors of gold today are white gold and rose gold.
|Caratage||Gold(Au)||Silver (Ag)||Copper (Cu)||Zinc (Zn)||Palladium (Pd)|
|White Gold||18k||75%||25% (or Pt)|
The alloying metal compositions above are typical of those used by the jewellery industry to arrive at the colour/caratage combinations shown, but these are not the only ways to arrive at these combinations.
White gold compositions listed here are nickel free. Nickel-containing white gold alloys form a small/very small percentage of white gold alloys and generally contain other base metals such as copper and zinc.