What is patina on jewellery?
By Jared James · Last updated 21 May 2026
Definition
Patina is the surface layer that forms on metal as it ages and reacts with its environment, changing its colour and texture in ways that are often beautiful. On silver it appears as a warm darkening in the recessed areas that adds depth; on copper and bronze it produces green or blue tones through reaction with oxygen and moisture. Jewellers either allow patina to develop naturally over time or introduce it deliberately using chemicals like liver of sulphur, giving pieces an aged, textured or coloured finish from the start.
Frequently asked questions
- Is patina on jewellery a sign of damage?
- Generally no, though it depends on the piece and the owner's preference. A natural patina on antique silver or bronze is considered part of the object's history and is usually preserved. Whether to clean a patina off or keep it is often a matter of taste.
- How do jewellers deliberately create a patina?
- The most common method is liver of sulphur, which reacts with silver and copper alloys to produce a dark grey to black surface. Ammonia fumes, salt solutions and other chemical recipes can produce greens, blues and browns on different metals.
- Does patina wear off?
- A natural patina tends to be stable once established, though handling and cleaning can affect it. A deliberately applied chemical patina, particularly on silver, can be thinner and may wear away from the high points of a piece over time with regular use.
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