What is sterling silver?
By Jared James · Last updated 21 May 2026
Definition
Sterling silver is an alloy of 92.5% pure silver and 7.5% other metal, almost always copper, which adds the hardness that pure silver lacks. It is the standard metal used for fine silver jewellery worldwide and is stamped 925 to indicate its purity. Sterling silver is bright, beautiful and affordable, but it does tarnish when exposed to air and sulphur compounds. Regular wear and occasional gentle polishing keeps it looking its best.
Frequently asked questions
- What does 925 mean on silver jewellery?
- The 925 stamp is the hallmark for sterling silver, indicating that the piece is 92.5% pure silver, the internationally recognised minimum for fine silver. If a piece is stamped 925, it is genuine sterling silver, not plated or silver tone.
- Does sterling silver tarnish?
- Yes, over time it reacts with sulphur in the air and on skin to develop a darkened, yellowish or blackish surface. It is easy to remove with a soft polishing cloth, mild silver cleaner or even a gentle scrub with a little toothpaste. The more you wear it, the less it tarnishes because skin contact keeps it polished.
- Can sterling silver be worn in the shower or pool?
- Occasional contact with water is fine, but prolonged exposure to chlorine, salt water and soap speeds up tarnishing and can dull the surface. It is worth removing sterling silver before swimming and wiping it dry after washing.
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