What is rhodium plating?
In jewelry, rhodium plating is a surface treatment that involves coating a piece of jewelry with a very thin layer of this precious metal. Belonging to the platinum family, it is distinguished by its luminous white color, its hardness, and its resistance to tarnishing. This process is mainly used on white gold and sterling silver to give them a more brilliant and uniform finish.
Why is rhodium plating applied?
White gold is made by mixing pure, naturally yellow gold with lighter-colored metals. Despite this composition, the resulting alloy may retain a slight gray, beige, or pale yellow hue. Rhodium plating then gives it a whiter and shinier appearance.
On sterling silver, rhodium helps preserve the jewelry's brilliance and slow down its natural tarnishing. Rhodium plating specifically helps to:
- give the jewelry a white and luminous finish;
- even out the metal's color;
- better protect its surface against tarnishing;
- create a barrier between the skin and certain metals present in the alloy.
How is rhodium applied?
Rhodium is applied to jewelry by electroplating, a process that involves immersing the piece in a bath containing this precious metal. An electric current then deposits a very thin, uniform layer on its surface. Before this step, the jewelry must be thoroughly cleaned and polished, as the plating adheres to the metal without concealing scratches or imperfections.
Does rhodium plating wear off?
Yes. As it is a surface treatment, rhodium plating gradually fades due to friction and daily wear. This wear is normal and does not mean that the jewelry is of poor quality. A wedding ring worn daily generally requires more frequent maintenance than a pendant or a pair of earrings, and the speed of wear varies depending on several factors:
- how often the jewelry is worn;
- friction with skin or other surfaces;
- skin acidity;
- contact with cosmetic and household products;
- the initial thickness of the plating.
Frequently asked questions about rhodium plating
Its lifespan varies depending on the type of jewelry and how often it's worn. A ring worn daily generally wears out faster than a necklace or earrings, which experience less friction.
Yes. Rhodium plating gives sterling silver a bright, white finish while also helping to protect it against tarnishing. However, it does not prevent wear or scratching.
A slight color difference may appear in the most exposed areas, such as the underside of a ring or around the prongs. White gold may appear warmer, while sterling silver may lose some of its luster.