I use a variety of precious metals in my work including, but not limited to:
There is a difference between the Traditional White Gold that you find in jewelry stores and the Palladium White Gold that I work with. The difference between these two metals is in their alloy. Gold is naturally yellow. To make it white, we need to add a white metal to it.
Traditional White Gold vs Palladium White Gold:
Traditional White Gold is made with nickel to make the gold white. Nickel is a low quality, inexpensive metal that people often find themselves allergic to. It will tarnish and irritate your skin. To avoid the tarnish and allergic reaction, traditional white gold is plated with Rhodium. This is the white finish you see on white gold jewelry in stores; it is not the gold itself. While Rhodium Plating does offer a white finish, it does wear off, exposing the nickel and potentially irritating your skin. You will need to have your white gold jewelry plated or "dipped" when you start seeing the pink nickel tarnish coming through which results in extra costs and maintenance for your beloved jewelry.
Palladium White Gold is made with Palladium instead of nickel to make the gold white. Palladium is a hypoallergenic metal that is closely related to platinum. It will never tarnish. Since Palladium White Gold does not need to be rhodium plated, it will not look like rhodium plated white gold. It will be a beautiful gray color and some may notice a very slight hint of yellow undertone - because it is, in fact, gold! 18k Palladium White Gold is whiter than 14k. Using Palladium in white gold instead of nickel will leave you with jewelry that needs less maintenance and stays the same color as the day you receive it. It is a great metal for those who are extremely sensitive to nickel.
950 Palladium is the purest palladium alloy used in jewelry. It is closely related to Platinum and is a very hard grey metal.