Tarnish or oxidisation

Tarnish, or oxidisation, refers to the dulling and discoloration that occurs on metal surfaces due to chemical reactions.

Part of speech: noun
Definition: In jewelry making, tarnish is a natural phenomenon that affects metal surfaces, including silver, gold, and copper, leading to a loss of luster and the development of a dark, sometimes green, film. This process, known formally as oxidisation, occurs as the metal reacts with sulfur-containing substances in the air or with skin acids when worn. Tarnish not only affects the aesthetic appeal of jewelry but, in severe cases, can also cause corrosion. Regular cleaning and preventative measures, such as proper storage and the use of anti-tarnish materials, are recommended to maintain the original beauty and integrity of the jewelry. Despite its drawbacks, some designers intentionally use tarnishing to create depth and contrast in their pieces, showcasing the potential for tarnish to add character and uniqueness to jewelry.