If you have bought gold jewellery in India recently, you may have noticed small symbols stamped on the inner side of the ornament — the BIS logo, a purity grade like "22K916", and a six-character alphanumeric code called HUID. These marks are part of India’s mandatory gold hallmarking system. This guide explains what the marks mean and why they matter.
What Is Hallmarking?
Hallmarking is an official certification that the gold jewellery you are buying is of the purity it claims to be. It is carried out by assaying and hallmarking centres recognised by the Bureau of Indian Standards (BIS), the national standards body under the Ministry of Consumer Affairs.
Before hallmarking became mandatory, buyers had to trust the jeweller’s word on purity. Now, every piece sold in notified districts must carry a BIS hallmark that proves its purity through independent testing.
What Does the Hallmark Stamp Contain?
After the latest rules came into force, a BIS-hallmarked piece of gold jewellery carries three symbols:
- BIS logo: A small triangular mark certifying that the jewellery has been assayed at a BIS-recognised centre.
- Purity grade / fineness: Indicates the gold content — for example, 22K916 (meaning 22 karat, 91.6% pure gold).
- HUID (Hallmark Unique ID): A six-character alphanumeric code unique to that specific piece of jewellery. HUID allows traceability from the hallmarking centre to the retail buyer.
Understanding Karat and Fineness
Gold purity is expressed in two ways:
| Karat | Fineness | Meaning |
|---|---|---|
| 24K | 999 | 99.9% pure gold — too soft for most jewellery |
| 22K | 916 | 91.6% gold, 8.4% other metals — most common for Indian jewellery |
| 18K | 750 | 75% gold — harder, used for studded and designer jewellery |
| 14K | 585 | 58.5% gold — often used for lightweight ornaments and watches |
Why HUID Matters
The HUID is the big change in the current hallmarking system. Every hallmarked ornament has a unique six-digit code engraved on it. When combined with the BIS database, this code allows:
- Verification that the piece was actually hallmarked (and not counterfeit).
- Traceability of which jeweller sold the piece and which centre assayed it.
- Better consumer protection in case of a dispute.
Consumers can verify an HUID using the BIS Care app, available on Google Play and Apple App Store, by entering the six-character code shown on the jewellery.
What Items Must Be Hallmarked?
Mandatory hallmarking applies to gold jewellery and artefacts sold in notified districts of India. BIS has rolled out the rule in phases. Jewellers must sell only hallmarked items of 14K, 18K, 20K, 22K, 23K, or 24K purity in these districts.
Certain exemptions exist, including watches, fountain pens, and specific industrial products. Jewellery intended for export is also handled under separate rules.
What If the Jeweller Does Not Give a Hallmarked Piece?
Under BIS rules, if you receive a non-hallmarked piece in a notified area, or the purity is found to be lower than claimed, you have the right to compensation. The jeweller is liable to pay twice the difference between the price charged and the actual value based on assayed purity, plus testing charges, as per the current BIS complaint framework.
Why This Matters for Investors
If you look at gold jewellery partly as an investment, hallmarking directly affects two things:
- True purity at the time of resale: A hallmarked 22K916 piece will fetch a fair price when you sell it back. Non-hallmarked pieces often get downgraded during buyback.
- Buyback transparency: Many jewellers quote resale value based on verified purity. Hallmarking reduces disputes.
That said, pure investment demand is better served by Sovereign Gold Bonds, Gold ETFs, or Digital Gold, since jewellery still carries making charges and GST that eat into returns.
How to Check Hallmark Before Buying
- Ask the jeweller to show you the hallmark under a magnifying glass.
- Verify all three marks are present: BIS logo, purity grade, and HUID.
- Note the HUID and verify it using the BIS Care app.
- Check that the invoice separately mentions the gold weight, purity, rate per gram, making charges, and GST.
Key Takeaways
- BIS hallmarking certifies the purity of gold jewellery and is mandatory in notified districts.
- A hallmarked piece carries the BIS logo, purity grade, and a unique HUID.
- Use the BIS Care app to verify the HUID of any piece before paying.
- For pure gold investment, consider Sovereign Gold Bonds, Gold ETFs, or Digital Gold rather than jewellery.
For complete, updated rules and the list of notified districts, refer to the official BIS website.
Trusted References
For verified and up-to-date information on the topics covered above, we recommend consulting the following official regulatory sources in India:
- SEBI — Securities & Exchange Board of India (markets regulator)
- RBI — Reserve Bank of India (banking & monetary policy)
- AMFI — Association of Mutual Funds in India
- NSE India — National Stock Exchange (live data & filings)
- Income Tax Department — for tax rules on investments