Gold Jewellery Hallmark Guide: How to Check Gold Purity Before Buying

Gold Jewellery Hallmark Guide: How to Check Gold Purity Before Buying

Aug 15 , 2026

Arvind Katrela

Buying gold without checking the hallmark is one of the most common and costly mistakes Indian jewellery buyers make. This gold jewellery hallmark guide explains exactly what BIS hallmarks mean, how to read purity marks, and what to check before spending a single rupee on gold jewellery. Shop certified hallmark gold jewellery at JCS Jewel Creations.

Introduction

 

Every buyer of gold jewellery in India needs a reliable gold jewellery hallmark guide because, without one, you are entirely dependent on a jeweller's word for something that directly affects the value of what you are buying. Gold purity is invisible to the naked eye.A 22-carat piece and an 18-carat piece look identical in a display case. Without a hallmark and the knowledge to read it, there is no way to know what you are actually gettingThis is not a niche concern. Gold adulteration and misrepresentation have been documented problems in the Indian jewellery market for decades, which is precisely why the Bureau of Indian Standards introduced mandatory BIS hallmarking for gold jewellery. The system exists to protect you, but only if you know how to use it.This guide overs everything you need: what BIS hallmarking is, how to read the marks on your jewellery, what each purity grade means, where to find the hallmark on a piece, and the key things to check before you buy. Whether you are buying for a wedding, an investment, or everyday wear, this is the information that makes you a confident gold buyer.

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What is BIS Hallmarking and Why Does it Exist?

The BIS hallmark issued by the Bureau of Indian Standards, India's national quality certification body, is the official government-backed system for certifying gold purity in India. A BIS hallmark on a piece of gold jewellery means the piece has been independently tested at a licensed Assaying and Hallmarking Centre and confirmed to meet the purity standard it claims.

BIS hallmarking for gold jewellery became mandatory in India in June 2021 for 14-carat, 18-carat, and 22-carat gold. Before this, hallmarking was voluntary, meaning a jeweller could sell you 18-carat gold as 22-carat with no legal obligation to prove otherwise. Mandatory hallmarking closed that gap and gave Indian buyers a legal standard to rely on.

Who Issues BIS Hallmarks?

 

BIS hallmarks are issued by licensed Assaying and Hallmarking Centres (AHCs), independent testing labs authorised by the Bureau of Indian Standards. Jewellers must submit their pieces to these centres for testing before they can be sold as hallmark gold jewellery. The hallmark on your piece is not applied by the jeweller; it is applied by the AHC after independent testing, which is what gives it its credibility as an authenticity verification tool.

How to Read a BIS Hallmark: The Complete Breakdown

A valid BIS hallmark on gold jewellery consists of specific marks that together confirm the piece's authenticity, purity, and traceability. Since 2021, the BIS has moved to a six-digit alphanumeric HUID (Hallmarking Unique ID) system that makes every piece individually traceable. Here is what you need to look for:

The BIS Logo

The first mark to look for is the Bureau of Indian Standards triangular logo. This is the certification mark confirming the piece has been tested by a licensed AHC. Without this mark, any purity claim on the jewellery is unverified and cannot be trusted for a genuine gold purity check.

The Carat and Fineness Number

The second element is the gold purity grade, expressed as a carat number and as a three-digit fineness number. The most common grades in India:

  • 24-carat: 999 fineness (99.9% pure gold; used in coins and bars, rarely in wearable jewellery)

  • 22-carat: 916 fineness (91.6% pure gold; the standard for Indian bridal and traditional jewellery)

  • 18-carat: 750 fineness (75% pure gold; preferred for diamond and gemstone jewellery settings)

  • 14-carat: 585 fineness (58.5% pure gold; used in lightweight contemporary jewellery)

When doing a gold purity check, matching the fineness number on the piece to the carat you are paying for is the single most important step. If the jeweller says 22-carat but the hallmark reads 750, you are holding an 18-carat piece.

The HUID: Hallmarking Unique ID

Since April 2023, every piece of hallmark gold jewellery in India carries a six-digit alphanumeric HUID, a unique code that links that specific piece to its assaying record. This is the most powerful consumer protection tool in the system. 

Enter the HUID on the BIS Care app or at bis.gov.in to verify the piece's certification completely independently without relying on the jeweller's word at all.

If a piece does not have a HUID, it either predates the current system or has not been properly hallmarked under the updated standard. For any new purchase, insist on a HUID-bearing hallmark.

The Assaying Centre Mark

The fourth element is the identification mark of the Assaying and Hallmarking Centre that tested the piece. This allows both the BIS and consumers to trace which independent lab verified the gold's purity, an additional layer of accountability in the authenticity verification chain.

Where Is the Hallmark Located on Gold Jewellery?

The hallmark is typically stamped or laser-engraved in a small, discreet location that does not affect the jewellery's appearance. Common locations include:

  • Rings - inside the band

  • Necklaces and chains - on the clasp or a small tag attached to the clasp

  • Bangles and kadas - on the inner surface

  • Earrings - on the post, the back clasp, or a small connecting tag

  • Pendants - on the reverse face or on the bail (the connecting loop)


Always ask the jeweller to show you the hallmark before purchase. Any reputed jeweller selling genuine hallmark gold jewellery will do this without hesitation. Reluctance to locate or show the hallmark is a significant red flag.

Myth vs Facts: Gold Hallmarking in India


  1. Myth: All Gold Sold in India Is Automatically Hallmarked

Fact: While BIS hallmarking became mandatory from June 2021, implementation has been phased and enforcement is ongoing. Older stock, jewellery from unlicensed smaller sellers, and pieces brought from abroad may not carry a BIS hallmark. Mandatory by law does not mean every piece in the market is hallmarked. Always verify the mark yourself, do not assume it is there.


  1. Myth: A Higher Price Means Higher Purity

Fact: Price is not a reliable indicator of gold purity. Making charges, design complexity, stone settings, and brand premium all affect the final price independently of the gold's actual purity. A heavily designed 18-carat piece can cost more than a plain 22-carat one. The only reliable indicator of purity is the BIS hallmark and its fineness number not the price tag or a jeweller's verbal assurance.


  1. Myth: Antique or Heirloom Gold Does Not Need to Be Verified

Fact: Antique and inherited gold jewellery predates mandatory hallmarking and often carries no certification mark. This does not mean it is impure, but it does mean its purity is unverified. If you are considering reselling, exchanging, or insuring heirloom gold, getting an independent gold purity check from a licensed assaying centre is highly advisable before any transaction.


Mistakes to Avoid When Buying Hallmark Gold Jewellery 


Not Verifying the HUID Before Purchase

The HUID is the most powerful verification tool available to Indian gold buyers and most buyers do not know it exists. Before finalising any gold purchase, take the HUID and verify it on the BIS Care app. 

This takes under two minutes and gives you independent confirmation that the piece is certified at the purity it claims. Skipping this step on a high-value gold purchase is the most avoidable risk in the entire process.


Confusing Carat With Quality of Craftsmanship

Carat measures gold purity, the proportion of pure gold versus alloy metals. It says nothing about craftsmanship, durability, or design quality. A beautifully made 18-carat piece can be a far better purchase than a poorly crafted 22-carat one, depending on your use case. 

For diamond and gemstone jewellery in particular, 18-carat (750) gold is often preferred because its higher alloy content makes it harder and more suitable for holding stone settings securely over time.

Not Retaining Your Hallmark Invoice

Your purchase invoice is part of your gold's authenticity documentation. It should specify gold purity, carat weight, the HUID, and making charges as a separate line item. This invoice is essential for insurance, resale, or exchange losing it significantly complicates any future transaction involving the piece. Store all jewellery documentation as carefully as the jewellery itself.

Expert Advice from JCS Jewel Creation

Our team always recommends verifying the HUID on the BIS Care app before completing any significant gold purchase, even at reputed showrooms. The hallmarking system is only useful when buyers actively use it. 

For bridal gold purchases in particular, where multiple high-value pieces are bought in a short timeframe, we walk every customer through the hallmark on each piece before the invoice is issued. Certification marks are not fine print, they are the most important information on any piece of gold jewellery you buy.

About Jcs Jewel Creation 

JCS Jewel Creations is a premium luxury jewellery boutique in T. Nagar, Chennai, founded in 2013 by Arvind Katrela. Every piece of gold jewellery at JCS carries a BIS hallmark with a verifiable HUID, and our team is committed to full transparency on gold purity, purity standards, and certification marks across every collection.

We believe informed buyers make the best customers which is why we walk every customer through the hallmark on their piece, explain what the fineness number means, and provide complete, itemised invoicing that documents gold purity, carat weight, and making charges separately. When you buy gold at JCS, you know exactly what you have and you have the documentation to prove it.

Explore Our Hallmarked Gold Collections


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Conclusion

A gold jewellery hallmark guide is only useful if you actually use it, and after reading this, you have everything you need. Check for the BIS logo. Read the fineness number. Find the HUID and verify it on the BIS Care app. 

Ask for an itemised invoice. These four steps take less than ten minutes and protect a purchase that may represent months of savings.

The BIS hallmark system exists specifically to give Indian buyers the tools to verify gold purity independently. Use those tools every time, without exception — regardless of how reputed the jeweller is or how well you know them. Certified gold is not just a legal standard. It is the only standard worth buying.

Explore JCS Jewel Creations' fully hallmarked gold jewellery collections at jcsjewellers.com, where every piece comes with certified purity documentation. Visit our T. Nagar showroom in Chennai or WhatsApp us at +91 89397 16704, we will walk you through every hallmark, every time.

Frequently Asked Questions

1. Does JCS Jewel Creations sell BIS hallmarked gold jewellery?

Yes. Every piece of gold jewellery at JCS Jewel Creations carries a valid BIS hallmark with a six-digit HUID that can be independently verified on the BIS Care app. Our team shows customers the hallmark on each piece before purchase and provides fully itemised invoices specifying gold purity, carat weight, and making charges separately. Certified, transparent gold buying is not optional at JCS, it is standard practice for every customer.

2. Can JCS Jewel Creations help me understand hallmarking on a piece before I buy?

Absolutely. Our specialists walk every customer through the BIS hallmark on their chosen piece  explaining what the fineness number means, how to verify the HUID, and what the certification marks confirm about purity standards. Whether you are a first-time gold buyer or an experienced one, we believe you should fully understand what you are buying before you buy it. Visit our T. Nagar showroom or WhatsApp us at +91 89397 16704 to start a conversation.

3. What is BIS certification and why is it important for gold jewellery in India?

BIS certification issued by the Bureau of Indian Standards, is India's official system for verifying gold purity. A BIS hallmark on gold jewellery confirms the piece has been independently tested by a licensed Assaying and Hallmarking Centre and meets the purity it claims. It became mandatory for gold jewellery in India from June 2021. Without a BIS hallmark, there is no independent verification of purity, making buyers entirely dependent on an unverified jeweller's assurance.

4. How do I verify gold purity on a piece I have already purchased?

If your piece has a six-digit HUID, enter it on the BIS Care app or at bis.gov.in to verify its assaying record. This will show the registered purity, hallmarking centre, and certification details. For older jewellery predating the HUID system, take the piece to a licensed Assaying and Hallmarking Centre for an independent gold purity check. Some reputed jewellers also offer testing services for existing pieces at their showrooms.

5. What does the 916 hallmark mean on gold jewellery?

916 is the fineness number for 22-carat gold, meaning the piece contains 91.6% pure gold, with the remainder being alloy metals like silver or copper that add durability and workability. It is the most common purity grade for traditional Indian gold jewellery, including bridal sets, haaram, bangles, and jhumkas. A 916 stamp alongside the BIS logo and HUID on hallmark gold jewellery confirms the piece meets verified 22-carat purity standards.

6. Is BIS hallmarking compulsory for all gold jewellery sold in India?

Yes, BIS hallmarking became mandatory for gold jewellery in India from June 2021 for 14-carat, 18-carat, and 22-carat gold. Jewellers are legally required to sell only BIS-hallmarked gold. However, older stock, jewellery from small unlicensed sellers, and pieces from outside India may not carry a valid BIS hallmark. Compliance is the jeweller's legal obligation, but verifying the hallmark before purchase remains the buyer's most important protective step.

7. I bought a gold necklace recently but I cannot find the hallmark what should I do?

Check all common hallmark locations first: the clasp area of the necklace, the connecting tag, or any small pendant attached to the chain. Use a magnifying glass as hallmarks can be very small. If you genuinely cannot locate the hallmark or HUID, take the piece to a licensed Assaying and Hallmarking Centre for independent testing, or contact the jeweller and request the purchase documentation, which should include the HUID on the original invoice.

8. What is the difference between 22-carat and 18-carat gold for jewellery?

22-carat gold (916 fineness) is 91.6% pure gold richer in colour and more traditionally used for South Indian bridal jewellery like haaram, bangles, and jhumkas. 18-carat gold (750 fineness) is 75% pure gold, harder and more durable due to its higher alloy content, making it better suited for diamond and gemstone jewellery where the setting must hold stones securely. Neither is universally superior the right choice depends entirely on the jewellery type and purpose.

9. Can fake or adulterated jewellery carry a BIS hallmark?

Under the BIS system, a counterfeit hallmark is a criminal offence. The HUID system introduced in 2021 makes fake hallmarks significantly harder to pass off, because each HUID is linked to a specific piece's certified assaying record that can be verified independently. While no system is completely fraud-proof, verifying the HUID on the BIS Care app before purchase is the most reliable consumer-level authenticity verification step available today for any gold jewellery purchase in India.

10. Why is purity certification important when buying gold in India?

Gold purity directly determines its value and resale price. A piece sold as 22-carat but made with 18-carat gold means you are paying for purity you are not receiving and recovering less on resale, exchange, or insurance. Purity certification through BIS hallmarking creates an independently verified, traceable record of exactly what you have purchased. In a high-value, trust-dependent market like gold jewellery, that third-party certification is the only protection a buyer has against misrepresentati

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