White gold itself does not naturally turn yellow. However, the rhodium plating commonly used on white gold jewelry can wear off over time, revealing the natural color of the white gold underneath. This can give the appearance of the white gold turning yellow.
White gold is an alloy made by mixing yellow gold with other metals such as nickel, palladium, or silver. The natural color of this alloy is often slightly off-white or grayish. To enhance its appearance and give it a bright, white finish, white gold jewelry is usually plated with rhodium, a shiny and reflective metal that belongs to the platinum group.
The rhodium plating is not permanent and can wear off due to regular wear and tear. Factors such as the acidity of the wearer’s skin, exposure to chemicals, and abrasion from daily activities can contribute to the wearing off of the rhodium layer.
If you notice your white gold jewelry starting to appear more yellow, it may be an indication that the rhodium plating needs to be reapplied. Many jewelers offer rhodium plating services to restore the white, shiny finish of white gold jewelry. Keep in mind that the frequency of re-plating will depend on how often you wear the jewelry and the specific care it receives.