Gold is naturally yellow. White gold is the term used for an alloy of gold with a white metal, such as palladium.
The highest quality of white gold is a gold and palladium alloy of at least 17 carats, sometimes with traces of platinum to increase its weight and durability.
To give a shine more comparable to platinum or silver, white gold is sometimes rhodium plated. However, if a rhodium-plated item is regularly used, this process may need to be repeated over time.