White gold is lighter than platinum but darker than sterling silver in appearance. This alloy is made by adding nickel or palladium to pure gold. Nickel white gold is harder to work with than palladium white gold because nickel is a harder metal. Furthermore, nick-el white gold often produces problems with firescale, making cleaning much more difficult.
Palladium white gold is a pleasure to work with because it is easier to form and leaves no firescale.