You're holding a piece of jewelry and wondering if it's really 925 sterling silver. It's a legitimate question — the market is full of imitations, thin plating, and low-quality alloys sold as pure silver. Here's how to recognize real 925 sterling silver in a few concrete steps.
What is 925 Sterling Silver?
925 sterling silver, also known as sterling silver, contains 92.5% pure silver and 7.5% other metals — usually copper — to increase its durability. It is the international standard for quality silver jewelry.
1. Look for the Hallmarking
The most reliable method is to check for the hallmark engraved on the jewelry. On an authentic piece, you will find one of these marks:
- 925 — the most common international code
- Sterling or Ster — mainly used in Anglo-Saxon countries
- 0.925 — decimal variant
The hallmark is usually found in discreet places: the inside of a ring, the clasp of a bracelet, the back of a pendant. Use a magnifying glass if necessary.
2. The Magnet Test
Pure silver is not magnetic. Hold a magnet close to the jewelry: if it's attracted, the piece contains iron or steel and is not 925 sterling silver. Be careful, however — this test rules out the coarsest imitations, but it doesn't distinguish silver from other non-magnetic metals like copper or zinc.
3. Observe the Oxidation
925 sterling silver oxidizes over time: it becomes darker, tending towards gray-black in areas less exposed to air. This patina is normal and can be easily removed with a special cloth. If the jewelry never shows any oxidation, it might be plated or made of a synthetic alloy.
4. The Acid Test (for experts only)
Professional jewelers use nitric acid to verify the purity of silver. A drop on a small area of the metal produces a specific color reaction: bright green indicates low-quality silver, dark red indicates authentic 925 sterling silver. Do not perform this test yourself without experience — acid is corrosive.
5. Trust a Certified Jeweler
The safest method is always verification by a professional. A certified jeweler can analyze the piece with XRF (X-ray fluorescence) instruments that determine the exact composition of the metal in seconds, without damaging the jewelry.
What to do if the jewelry has no hallmark?
In Italy, by law, all precious metal jewelry sold must bear the fineness mark and the manufacturer's or importer's mark. The absence of a hallmark is a red flag. It could be a very old piece, uncertified handcrafted item, or — more often — an imitation.
CM Silver Jewels
Every CM Silver Jewels 925 sterling silver piece is certified, hallmarked, and comes with a guarantee certificate included in the gift box. No ambiguity, no compromise on metal quality.
→ Discover our collection of Women's 925 Sterling Silver Necklaces | Women's Bracelets | Men's Bracelets | Best Sellers
Do you have doubts about a piece of jewelry you already own or want to verify a purchase? Message us on WhatsApp — we'll reply in minutes.
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