When you buy a silver piece of jewelry, the number stamped on the metal is not a minor detail: it is the guarantee of the quality you are purchasing. In this guide, we explain the differences between 925, 800, and 950 silver, how to recognize a certified piece of jewelry, and why the choice of silver fineness makes a difference over time.
What is silver fineness?
Fineness indicates the percentage of pure silver present in the alloy. 100% pure silver (known as fine silver) is too soft to be worked into jewelry: it scratches, deforms, and does not maintain its shape. For this reason, it is alloyed with other metals, usually copper, to increase its resistance.
The most common fineness levels in jewelry are:
- 999 Silver — 99.9% pure silver. Extremely rare in jewelry, too soft for daily use.
- 925 Silver — 92.5% silver + 7.5% copper. The international standard for quality jewelry.
- 800 Silver — 80% silver + 20% other metals. Common in flatware and objects, less used in modern jewelry.
- 950 Silver — 95% silver. Purer than 925, used in high-end jewelry, softer and more expensive.
925 Silver vs. 800 Silver
800 silver was the Italian standard until the 1990s. Today it is still present in many vintage jewels and flatware, but in modern jewelry, it has been almost completely replaced by 925 silver.
| 925 Silver | 800 Silver | |
|---|---|---|
| Purity | 92.5% | 80% |
| Brilliance | High | Medium |
| Resistance to oxidation | Good | Lower |
| Hypoallergenic | Yes (nickel-free) | Depends on the alloy |
| International standard | Yes | No |
925 Silver vs. 950 Silver
950 silver is purer than 925 but not necessarily better for everyday jewelry. Being softer, it scratches more easily and requires more care. It is mainly used in high-end artisanal jewelry and in some markets such as Japan.
For jewelry to be worn every day, 925 silver offers the best balance between purity, resistance, and workability.
How to recognize a certified 925 silver piece of jewelry
An authentic 925 silver piece of jewelry must have the fineness mark stamped on the metal. In Italy, the official marks are:
- 925 or Sterling — the most common mark, visible with a magnifying glass
- Manufacturer's mark — mandatory by law in Italy, identifies the producer
- Guarantee mark — affixed by an official assayer, certifies the fineness
Beware of jewelry without marks or with illegible marks: they could be silver-plated or made of an uncertified alloy.
925 Silver and 18kt gold plating: how does it work?
Many CM Silver Jewels pieces are made of 925 silver with 18-carat gold plating. This means that the base is certified sterling silver, coated with an 18kt gold layer through an electroplating process. The result is a piece of jewelry with the solidity of 925 silver and the warm luminosity of gold, at an accessible price compared to solid gold.
Conclusion
When buying a silver piece of jewelry, always choose certified 925 silver: it is the international standard, guarantees quality, is nickel-free, and maintains its brilliance over time. Explore our collection of certified Made in Italy 925 silver jewelry.
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