If you’ve ever bought gold jewellery, a coin, or even a small ornament, you’ve probably heard the term “hallmark gold” or “BIS hallmark gold.” But what do these markings really mean? Are they just fancy stamps on bangles and chains, or do they actually affect how valuable your gold is?

Let’s take a closer look at the hallmark gold meaning, the different types of gold markings you see in India, and why they matter when you’re buying or selling gold, or even when you’re using your gold as collateral for a loan.

What Does the Hallmark Gold Mean?

Hallmarking is a guarantee of gold purity. It’s like an authenticity certificate, only this one is imprinted directly on your jewellery.

The Bureau of Indian Standards (BIS) is the national body responsible for setting quality norms that introduced hallmarking in India to ensure consumers don’t get cheated when buying gold. The BIS hallmark gold stamp confirms that the jewellery has been tested and verified for its purity by an authorised laboratory.

When you see that hallmark, it’s reassurance. It tells you your gold truly matches what’s written on your bill.

Gold Purity Marking: What Those Tiny Numbers Mean

Look closely at a hallmark gold ornament. You’ll notice tiny symbols, numbers, or letters engraved, often on the inside of a ring or the clasp of a chain. Each marking reveals something important. Here’s what to look for:

• BIS logo – This is a small triangle with a dot and line inside. This is a proof that the ornament meets the Bureau of Indian Standards’ benchmark for purity.
• Purity in karat – This marking could have 22K916, 18K750 or something similar. The first part (like 22K) tells you the karat. The numbers (like 916) show the parts of pure gold in 1,000 parts of the metal. For example, 22K916 means 91.6% pure gold.
• Assaying and hallmarking centre’s unique number – To ensure traceability, each authorised testing centre has a unique identification mark.
• Jeweller’s identification mark – Every BIS-registered jeweller has their own stamp. This lets authorities verify where the piece was made or sold.

Together, these four hallmarks confirm authenticity from end to end.

Why BIS Hallmark Gold became Compulsory

Until a few years ago, hallmarking was optional. Many jewellers sold gold based on trust—and though trust matters, it often led to misunderstandings. To bring uniformity, the Indian government made hallmarking mandatory from June 2021 onward, but only for certain purity grades like 14K, 18K, and 22K.

With hallmarking, things became largely clear and fair. Today, most banks, NBFCs, and financial institutions prefer BIS hallmark gold when accepting jewellery as security.

Understanding the Karat Stamp

When we talk about gold purity, the word ‘karat’ often comes up. The karat stamp, written as 22K or 18K, simply tells how much pure gold is mixed with other metals.

24-karat gold is the purest form, almost 99.9% gold, but it’s too soft for jewellery. So, jewellers mix metals like copper or silver to make it harder.

How Hallmarking Affects You as a Buyer

Here’s what hallmarking means for you:

• Trust in purity – You know the gold purity marking is verified by an independent lab. It is not just the jeweller’s claim.
• Fair resale value – When you want to sell, hallmark gold pieces get you better rates because buyers trust their authenticity.
• Simpler loan process – Financial companies often appraise and process loans quicker when jewellery is BIS hallmarked. The risk of lower valuation decreases.

If you’re pledging jewellery for a gold loan during an emergency or for business expansion, hallmark gold can help you get a higher amount and faster approval.

What Happens If Gold Is Not Hallmarked

Many still hold gold bought years ago before hallmarking became mandatory. Does that mean it’s worthless? Not at all. You can still get it hallmarked at authorised centres or, if needed, tested before sale or pledging.

However, non-hallmarked gold typically undergoes purity testing (acid or machine-based) at the time of transaction. This may result in minor valuation differences if actual purity doesn’t match expectations.

So while it’s not a problem if you own older pieces, hallmarking future purchases saves plenty of trouble.

Hallmarking vs. KDM Gold

Older buyers might still refer to “KDM gold.” KDM stands for cadmium solder used in jewellery making. Earlier, jewellers used cadmium-based solder, and ornaments made with it were called KDM gold. Later, because cadmium was found harmful for workers’ health, the Bureau of Indian Standards discouraged it.

Now, hallmark gold has replaced KDM completely. KDM only described a manufacturing process. Hallmarking, on the other hand, ensures verified purity. So if you’re comparing hallmark versus KDM, always go for hallmark gold. It’s authentic and safer.

The Future of Hallmarking in India

The government continues expanding hallmarking coverage to smaller districts and towns. Even small workshops are being encouraged to register. With the introduction of HUID-based marking, each gold item has its own identity. This makes it almost impossible to duplicate or ruin the ornament.

So whether you’re buying for a wedding or investing for security, BIS hallmark gold is here to stay as the benchmark of quality and fairness in the Indian market.

Conclusion

Hallmarking may seem like a minor technical detail but it’s actually a major milestone for Indian gold buyers. It gives assurance that your gold is truly worth what you pay—and that you’ll receive fair value whenever you pledge or exchange it.

If you are thinking of applying for a gold loan, check out our website and apply for a hassle-free gold loan with Shriram Finance.

FAQs

What is hallmark gold?

Hallmark gold means gold jewellery or coins tested and certified for purity by the Bureau of Indian Standards (BIS). The hallmark stamp confirms its karat and authenticity.

Why is BIS hallmark important?

BIS hallmark ensures buyers get exactly what they’re paying for. It prevents fraud and guarantees gold purity.

How to identify genuine hallmark gold?

Look for the BIS logo, purity marking (like 22K916), the assaying centre’s code, the jeweller’s mark, and a unique HUID number. Always check these against your bill.

Does hallmarking affect resale and loan value?

Yes. Hallmarked gold generally gets you a higher resale and loan value because purity is guaranteed and easily verifiable by any buyer or lender.

Can I pledge gold coins or bars for a gold loan, or is it only jewellery?

Most lenders accept only hallmarked gold jewellery and specially minted gold coins as collateral against gold loans. According to RBI guidelines effective April 2025-2026, only 22-karat or higher purity gold items qualify.