What is rhodium plating?
Rhodium plating — is a galvanic process of applying a thin layer of rhodium (0.1 to 25 microns) to the surface of jewelry, most often made of silver or white gold.
Rhodium is a noble metal of the platinum group. It is distinguished by its high hardness, corrosion resistance, and a bright, cool luster that surpasses that of silver itself. The main purpose of rhodium plating silver is to reliably protect the metal from natural oxidation and darkening upon contact with oxygen, moisture, or skin.
The coating gives the silver a mirror-like shine, visually resembling white gold or platinum. Furthermore, the rhodium layer makes the jewelry hypoallergenic, preventing direct skin contact with the base alloy.
Main types
There are several types of rhodium plating used in jewelry, which vary in color and visual effect.
- White (light) rhodium plating: A classic transparent silver coating. It creates a maximum light-reflecting effect and imparts a cool metallic sheen to the piece.
- Black rhodium plating: A ruthenium-infused coating that produces shades ranging from graphite to deep black. It's used to give jewelry a vintage look, highlight the texture of the metal, or accentuate dark accents.
- Decorative (colored) rhodium plating: Localized application of other shades, such as pink or yellow. Used to highlight individual design elements within a complex piece.
How to care
The rhodium coating tends to wear off over time, especially on rings and bracelets that are subject to constant mechanical friction. Therefore, rhodium-plated items should never be cleaned with abrasive powders or hard brushes.
Jewelry should be protected from harsh chemicals. It should be removed before swimming in chlorinated water, cleaning with household detergents, or applying cosmetics.
To properly clean rhodium-plated silver, simply rinse it in a warm soapy solution. Then, wipe the item dry with a soft microfiber or flannel cloth.
If the protective layer wears off and dull or yellowish spots appear on the metal, the coating can be completely restored. The rhodium plating process is performed in jewelry workshops by re-plating.
