Oxidize

To undergo or cause a substance to react with oxygen, leading to a change in appearance or integrity, commonly seen in jewelry metals.

Part of speech: verb
Definition: In jewelry, to oxidize means to cause a metal to react with oxygen, leading to a change in the metal's appearance or integrity. This process, whether occurring naturally over time or induced artificially, can result in a patina or a tarnish on the surface of the metal. Oxidation can affect various metals used in jewelry, such as silver, copper, and even gold alloys, altering their color and lustre. While often considered a drawback, oxidation is also intentionally used by jewelers to create intricate designs and contrasts, especially in sterling silver pieces, where the darkened areas emphasize detail and add a vintage or antiqued look. Proper care and maintenance, including regular cleaning and storage, can minimize unwanted oxidation and preserve the desired appearance of jewelry.