925 Silver vs Pure Silver: What Is the Difference?
When shopping for silver jewellery in India, you'll often come across terms like "925 silver", "pure silver", "999 silver", and "sterling silver". Understanding the difference between these is essential before you spend money on a piece you'll wear for years.
What Is Pure Silver (999 Silver)?
Pure silver, also called fine silver or 999 silver, is 99.9% silver with almost no other metals. It is the purest form of silver available. The problem? Pure silver is extremely soft. It bends easily, scratches quickly, and is not suitable for jewellery that takes daily wear. You'll find 999 silver used in silver coins, silver bars, and some traditional Indian religious articles — not in rings or earrings that need to hold their shape.
What Is 925 Sterling Silver?
925 sterling silver is an alloy of 92.5% pure silver and 7.5% other metals — typically copper. This small addition of copper dramatically improves the hardness and durability of the silver without noticeably affecting its appearance or value. The result is metal strong enough for intricate jewellery designs, stone settings, and clasps that open and close thousands of times without failing.
The "925" number refers to the parts per thousand of pure silver content. This is why jewellery stamped with "925" or ".925" is guaranteed to contain at least 92.5% silver.
Key Differences at a Glance
| Property | 925 Sterling Silver | Pure Silver (999) |
|---|---|---|
| Silver content | 92.5% | 99.9% |
| Hardness | High — suitable for jewellery | Very soft — bends easily |
| Durability for daily wear | Excellent | Poor |
| Tarnish resistance | Good with care | Better (but still tarnishes) |
| Common use | All jewellery | Coins, bars, religious items |
| Price | Slightly lower | Slightly higher |
Does 925 Silver Tarnish?
Yes, 925 sterling silver can tarnish over time. The copper in the alloy reacts with oxygen and moisture in the air to form silver sulphide — the dark coating you may notice on older silver pieces. However, 925 silver tarnishes much more slowly than lower-quality silver alloys, and the tarnish can be easily cleaned at home with baking soda, a soft cloth, or a silver polishing cloth.
At Silzze, our 925 silver pieces are finished with a light anti-tarnish coating to further slow the oxidation process, keeping your jewellery bright for longer.
What About Silver Plating?
Silver-plated jewellery is completely different from 925 sterling silver. It consists of a base metal (usually copper, brass, or zinc alloy) coated with a very thin layer of silver. The plating wears off within months of regular wear, revealing the base metal underneath. Silver-plated pieces are not valuable, not hallmarkable, and often cause skin reactions as the base metal is exposed.
If you want silver jewellery that lasts, always choose 925 sterling silver over silver-plated options.
BIS Hallmarking in India
In India, the Bureau of Indian Standards (BIS) certifies the purity of precious metals including silver. A BIS hallmark on a silver piece guarantees its 925 purity. Look for the BIS logo, the purity mark (925), and a six-digit HUID code. Reputable brands like Silzze provide full BIS-certified sterling silver as standard on every piece.
Browse our full range of BIS hallmarked 925 sterling silver jewellery, including pendants, chains, and rings for everyday wear.