Buying gold jewellery is as much about trust as it is about design. Whether you're picking out a statement piece for a wedding, choosing something meaningful for a gift, or treating yourself to a special buy, you want to be certain that what you're paying for is exactly what you're getting. That's where BIS hallmarking and the HUID number come in — India's official system for guaranteeing gold purity and authenticity.
This guide breaks down what these marks mean, why they matter, and exactly how to verify them before you make a purchase.
Why Hallmarking Matters
Gold jewellery in India is sold in a market built on trust — trust in the karat, the weight, and the making charges quoted by the jeweller. Without a formal, checkable standard, that trust runs in only one direction: from buyer to seller, with no way to verify.
The Bureau of Indian Standards (BIS) fixed this gap with mandatory hallmarking. Since July 1, 2021, hallmarking has followed a revamped, unique-identity-based system, and by early 2026 hallmarking had extended to hundreds of districts across the country, covering nearly all major markets. Millions of gold items have since been hallmarked under this system, giving buyers a reliable, independently verified guarantee of purity.
What Is a BIS Hallmark?
A BIS hallmark is official certification that a piece of gold jewellery has been tested by a BIS-recognised Assaying and Hallmarking Centre (AHC) and meets the purity it claims to. On any hallmarked piece, you should be able to find three marks stamped or laser-engraved together:
- The BIS logo — a triangular mark confirming certification by the Bureau of Indian Standards.
- The purity/fineness grade — for example, 22K916 (22 karat, 91.6% pure) or 18K750 (18 karat, 75% pure).
- The HUID number — a six-character alphanumeric code unique to that specific piece of jewellery.
Together, these three marks tell you what the metal is, how pure it is, and — thanks to the HUID — exactly which piece this is, checkable at any time against BIS's own records.
What Is HUID?
HUID stands for Hallmark Unique Identification. It's a six-digit alphanumeric code assigned to every single piece of hallmarked gold jewellery at the time of testing, and it is laser-engraved directly onto the item. Unlike the older hallmarking system, which used separate hand-stamped symbols for the assaying centre and the jeweller, HUID links each piece to a single digital record in the BIS database — including its purity, the jeweller who sold it, and the centre that tested it.
This makes every hallmarked item individually traceable, which is a major improvement over older systems that were easier to counterfeit.
How to Verify BIS Hallmark and HUID: Step-by-Step
Verifying a hallmark takes just a couple of minutes and can be done right at the jewellery counter or later at home.
Step 1: Locate the Marks
Look closely at the piece — often on the inside of a band, near a clasp, or behind a pendant — for the BIS triangle, purity grade, and the six-character HUID code. These marks are usually small, so a magnifying glass or your phone's macro camera can help.
Step 2: Download the BIS CARE App
The official verification tool is the BIS CARE app, available on both Android and iOS. It's free and only requires a one-time registration with your mobile number.
Step 3: Enter the HUID Code
Open the app, go to the "Verify HUID" section, and enter the six-character code exactly as it appears on the jewellery.
Step 4: Check the Details
The app will return the registered details for that exact piece — purity, article type, the jeweller's name, and the hallmarking centre that tested it. If everything matches what you've been told at the counter, you can go ahead with confidence. If there's no record, or the details don't match, that's a red flag worth raising before you buy.
You can also verify hallmark and jeweller registration details through the BIS website if you'd rather check on a desktop.
Tips for Buying Gold Jewellery with Confidence
- Always ask for the HUID before payment, not after. A genuine jeweller will happily show you the code and let you verify it.
- Check that the invoice matches the hallmark — purity, weight, and HUID should all be consistent across the physical piece and the paperwork.
- Buy from BIS-registered outlets. You can look up licensed jewellers on the BIS portal by region if you're ever unsure.
- Older, pre-2021 jewellery without a HUID isn't illegal to own or sell privately, but it should be re-assayed if you want its purity independently confirmed.
Choosing the Right Piece for the Occasion
Once you're confident about purity and authenticity, the fun part is choosing a design that fits the moment:
- Heading out for an evening event? Explore Gold Jewellery for Party Wear for pieces designed to stand out under the lights.
- Looking for something meaningful to give a loved one? Browse Gold Jewellery for Gifting for options that suit every relationship and occasion.
- Celebrating someone's special day? Check out Gold Jewellery for Birthday Gifts for thoughtful pieces that make the day even more memorable.
Final Thoughts
A BIS hallmark and its HUID code aren't just symbols — they're your proof that the gold you're buying is exactly what it claims to be. Taking two minutes to verify the HUID on the BIS CARE app before you pay can save you from costly mistakes and give you complete peace of mind, whether you're buying for yourself or someone special.
