What Does 925 Sterling Silver Mean on Earrings, and Will It Tarnish?
Summary
A 925 mark means the piece is represented as sterling silver: 92.5% silver, with other metals making up the remaining 7.5%.
Yes. Genuine sterling silver tarnishes, so darkening on its own does not mean the earrings are fake.
For earrings, check more than the front decoration. Posts and backs may be separate components, and a 925 stamp does not by itself tell you what every part is made from or whether the pair is appropriate for a new piercing.
925 tells you the silver fineness
Sterling silver is not pure silver. The 925 mark refers to fineness: 925 parts of silver per 1,000 parts of metal. That is 92.5% silver.
The FTC uses the same threshold in its jewelry guidance. A product described as “sterling silver” or “sterling” should contain at least 925/1,000 silver. Terms such as silver-tone and silver-plated mean something different. Silver-tone may describe only color, while silver plate has a layer of silver over another metal.
Why genuine sterling silver can turn dark
Tarnish forms on the surface of silver when it reacts with substances around it. Tiffany & Co. says sterling silver tarnishes when exposed to salty air, chlorine, sulfur, humidity, perspiration, cosmetics, household bleach, and other strong chemicals. Two genuine sterling-silver earrings can therefore age differently if they are worn and stored differently.
Tarnish is not the same thing as plating wearing away. Sterling silver is the alloy throughout the piece unless the seller says otherwise. Silver-plated jewelry depends on a surface layer, so once that layer is worn through, polishing cannot replace the missing silver coating.
The post and backing may not be the same material as the front
Stud earrings are assembled from several parts. The decorative front, post, and backing may not all use the same metal. A clear product listing should tell you what the parts that touch your ear are made from, not just describe the visible face of the earring.
If your ears have reacted to jewelry before, the 925 mark is useful but incomplete information. Sterling silver is an alloy, and the mark does not identify every metal in that alloy or in separate components.
Sterling silver is not on the piercers’ list for fresh piercings
A new or healing piercing has different requirements from a healed ear wearing fashion earrings. The Association of Professional Piercers names the materials it accepts for initial jewelry: specific grades of steel and titanium, niobium, gold of 14k or higher, platinum, and glass. Silver does not appear anywhere in that guidance.
If the piercing is still healing, let a qualified piercer help with the material, post dimensions, and fit instead of choosing only by the 925 stamp.
Storing and cleaning sterling silver earrings
Tiffany’s storage advice is to keep silver “absolutely dry,” to add a small packet of desiccant if your climate is humid, and to keep it away from rubber bands, because the sulfur in rubber causes tarnishing. It also suggests a box lined with tarnish-proof fabric, with a separate space for each piece.
When tarnish appears, use a cleaning method intended for sterling silver and check whether the earrings also contain pearls, porous stones, enamel, intentional oxidation, or adhesive-set elements. Tiffany warns that an oxidized finish, the deliberate blackening of crevices in a design, “can be removed by overzealous cleaning and polishing.”
Looking for a piece? Browse the Jeweldipity feed →
Sources
- Federal Trade Commission, Buying Platinum, Gold, and Silver Jewelry
- 16 CFR 23.5, Misrepresentation as to silver content
- Tiffany & Co., Does Sterling Silver Tarnish?
- Tiffany & Co., How should I store my silver?
- Tiffany & Co., How do I care for my Tiffany & Co. Sterling silver?
- Association of Professional Piercers, Jewelry for Initial Piercings
We have not tested any products. Details are as published on these pages on the date above and can change; the seller's or maker's page has the current version.