If you see the number 925 stamped on a piece of jewellery, it usually means it is made from 925 sterling silver: an alloy containing 92.5% pure silver and 7.5% other metals, commonly copper. This combination keeps the look of silver while giving it the strength needed for everyday jewellery.
In this guide, we explain what 925 means, whether it is silver or gold, how to identify sterling silver and why genuine silver can darken over time.
What does 925 mean on jewellery?
The number 925 refers to the proportion of silver in the alloy: 925 parts out of every 1,000 are silver. That is why it is also known as sterling silver or 925 silver.
Nearly pure silver, commonly marked 999, is softer. For rings, necklaces, bracelets and earrings, 925 silver is widely used because it offers a practical balance of purity, durability and workability.
Is there a difference between 925 and S925 silver?
In practice, 925 and S925 usually refer to the same sterling silver standard: an alloy containing 92.5% silver. The S is commonly used as a reference to silver or sterling silver; it does not indicate a different purity. A hallmark alone, however, is not a substitute for professional testing if you need to confirm the exact composition of a piece.
Is 925 silver or gold?
925 identifies silver, not gold. A piece can look gold and still be made from 925 silver if a layer of gold has been applied over the silver base. The main metal remains sterling silver; the plating provides the gold colour and finish.
How to tell whether 925 silver is genuine
A 925 hallmark is a common sign, but it is best to consider the piece as a whole and where it comes from. These checks can help:
- Look for a 925 or S925 mark. It is often placed discreetly on a clasp, inside a ring or on the back of a pendant.
- Check the material information. A clear product description should say whether the piece is sterling silver, silver-plated or simply silver-coloured.
- Check how it reacts to a magnet. Silver is not ferromagnetic, so strong attraction can indicate the presence of other metals. Not sticking to a magnet, however, does not prove that an item is silver.
- Ask a professional if you need certainty. A jeweller or laboratory can verify the metal composition using specialist testing methods.
Does 925 silver turn black?
Yes. Sterling silver can darken or tarnish over time. This is a normal process caused by reactions with compounds in the air, moisture, cosmetics and everyday wear. Tarnishing does not automatically mean that a piece is fake.
In most cases, shine can be restored with suitable cleaning and a silver polishing cloth. Storing jewellery dry and separately can also help slow the process.
925 silver vs fine silver vs silver-plated jewellery
| Type | Approximate composition | What it means |
|---|---|---|
| Fine silver 999 | 99.9% silver | Very high purity and softer metal. |
| Sterling silver 925 | 92.5% silver | A widely used jewellery standard balancing purity and strength. |
| Silver 800 | 80% silver | An alloy with a lower silver content. |
| Silver-plated piece | Surface layer of silver over another metal | Not the same as a piece made from solid 925 sterling silver. |
What about gold-plated 925 silver?
A 925 silver piece can be coated with gold to create a golden finish. Oshun uses this combination in different designs: a sterling silver base with gold plating for the final colour.
If you like geometric jewellery, discover the Triyan 925 silver necklace. For a piece inspired by history, see our Roman Coin 925 silver pendant.
Why knowing what you are buying matters
Understanding what 925 means makes it easier to compare jewellery properly. It is not only about colour: knowing the base metal, finish and care requirements helps you choose a piece that fits what you are looking for and keep it in better condition.
Explore Oshun Jewelry collections and check the materials and finishes listed on each product.