How is sterling silver (925) tested?
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Sterling silver is 92.5% pure silver alloyed for strength. Plated brass and nickel silver are often sold as “silver colour.” Know the checks so your invoice matches the metal you receive.
What 925 means
The stamp 925 (or Sterling) means 925 parts per thousand silver, usually with copper for hardness. Fine silver (.999) is softer and rare in everyday jewellery.
Indian BIS hallmarking for silver articles helps verify purity when present on the piece.
Hallmarks and invoices
Look for 925 on an inconspicuous spot — inside shanks, on clasps, or earring posts. Match the description on your bill: “sterling silver 925” not just “silver colour.”
Reputable sellers state weight in grams and purity on the invoice.
Simple checks at home
Sterling tarnishes to a yellow-brown patina; many platings peel or show a different colour at worn edges.
A strong magnet test: sterling is not magnetic; steel cores in fakes may stick. This is indicative, not definitive — use a jeweller’s acid or XRF test for certainty.
Care and longevity
Store in anti-tarnish pouches, avoid chlorine and perfume contact, and polish with a soft cloth — not abrasive toothpaste on oxidised finishes.
Rhodium-plated silver stays bright longer; when replating is needed, ask whether the base metal is verified 925 first.