BIS Hallmark Explained: How to Read the Hallmark on Gold Jewellery

BIS Hallmark is an official stamp given under the Bureau of Indian Standards (BIS) Hallmarking Scheme that assures the purity of gold jewellery sold in India. It enables buyers to check the gold purity of the jewellery claimed by the seller and has a unique Hallmark Unique Identification (HUID) number for traceability.

Table of Contents

• What is BIS Hallmark?
• Why is Hallmark Important?
• What Does a BIS Hallmark Include?
• Understanding the HUID
• How to Verify Hallmark Jewellery
• Hallmark vs Certification
• FAQs

Introduction

Gold jewellery is often bought for both emotional and financial reasons.

Whether you are buying an engagement ring, wedding band, pendant, earrings or necklace you want to have confidence that the gold you are paying for is actually the purity being advertised.

That is exactly why BIS Hallmarking exists.

Today, BIS Hallmarking has emerged as one of the most significant trust marks while purchasing gold jewellery in India.

But still many buyers ask:

• What does BIS Hallmark actually mean?
• Is every gold ring hallmarked?
• What is an HUID number?
• Can I verify my jewellery online?
• Does BIS certify diamonds too?

In plain language, this guide answers those questions.

What Is BIS Hallmark?

BIS stands for Bureau of Indian Standards, India’s national standards body.

A BIS Hallmark signifies that the gold present in a jewellery item has been tested and found to conform to the declared fineness standard.

For example:

When you buy a 14K gold diamond ring, look for the 585 fineness mark, which means 58.5% is pure gold.

A 9K gold ring should also have the 375 stamp.

Why Is BIS Hallmark Important?

A hallmark guarantees that the gold content is what the jeweller says it is.

Without hallmarking, the purity of the gold would be difficult for the majority of consumers to independently verify.

Benefits include:

• Greater transparency.
• Assurance of gold purity.
• Easier comparison between jewellers.
• Increased buyer confidence.
• Better consumer protection.

One of the first things to check when buying fine jewellery is hallmarking.

Does BIS Hallmark Certify Diamonds?

Nope.

This is one of the biggest misconceptions among jewelry buyers.

A BIS Hallmark is a mark of purity of the gold (or other eligible precious metal under the relevant hallmarking scheme).

It does not grade or certify the diamond .

Independent gemological laboratories such as IGI or SGL separately assess the quality of diamonds.

Think of it like this:

If you're buying diamond jewellery, both are important because they verify different parts of the product.

What Does a BIS Hallmark Include?

Modern BIS-hallmarked jewellery typically includes:

• BIS logo
• Purity/Fineness mark (e.g. 585, 750)
• Six-digit alphanumeric HUID
• Jeweller identification (where applicable)

Together, these markings help identify the jewellery and confirm its purity.

Understanding Gold Purity

Many buyers confuse karat (K) with purity percentages.

Here's an easy comparison:

Pure gold (24K) is relatively soft, so jewellery is usually made using gold alloys to improve durability.

For diamond jewellery, 14K is one of the most popular choices because it balances strength and appearance.

Which Gold Is Best for Diamond Jewellery?

Different buyers have different priorities.

9K Gold

Suitable for:

• Budget-conscious buyers
• Everyday jewellery
• Entry-level fine jewellery

Advantages:

• More affordable
• Durable
• Lower overall jewellery cost

14K Gold

The most popular option for:

• Engagement rings
• Wedding bands
• Daily wear

Advantages:

• Excellent durability
• Rich appearance
• Good balance of price and purity

18K Gold

Ideal for:

• Luxury jewellery
• Premium collections
• High-end gifting

Advantages:

• Higher gold content
• Richer yellow colour
• Premium feel

What Is an HUID?

One of the most important new features of the BIS Hallmarking system is Hallmark Unique Identification (HUID).

Each hallmarked gold jewellery item has a unique six-character alphanumeric code, called a HUID. This code helps to track that particular piece and improves traceability within the hallmarking system.

It’s like a unique ID for your jewellery.

In the older hallmarking systems many pieces would have the same marks. Today each hallmarked jewellery piece has its own HUID.

Why Is the HUID Important?

The HUID increases transparency for jewellers and buyers alike.

Its advantages are:

• Helps in identifying individual jewellery items.
• Increases traceability.
• Supports verification of authenticity.
• Boosts consumer confidence.
• Makes hallmarking system more transparent

When buying gold jewellery you should be able to find the HUID on the jewellery and where applicable on your invoice or supporting documents.

Where Can You Find the Hallmark?

The hallmark is typically stamped in an obscure but accessible spot.

Examples include:

The exact placement may vary from piece to piece due to jewellery designs being different.

How to Check BIS Hallmarked Jewellery

Please take a few moments to look at the jewellery before you complete your purchase.

Step 1 – Look for the Hallmark

Check that the jewellery includes:

• BIS logo
• Purity mark (375, 585, 750, 916, etc.)
• HUID
• Other applicable hallmark information

Step 2 – Match the Purity

Ensure the fineness mark matches the gold purity you are purchasing.

Examples:

If you're purchasing a 14K diamond ring, the hallmark should display 585.

Step 3 – Request the Invoice

Always ask for a detailed invoice showing:

• Gold purity
• Diamond details
• Weight
• Certification (where applicable)
• Product description

Keep this document for future servicing, warranty, exchange, or valuation.

Step 4 – Review the Product Details

For diamond jewellery, verify both:

• Gold purity (BIS Hallmark)
• Diamond certification (IGI or SGL, if applicable)

These two documents confirm different aspects of your purchase.

BIS Hallmark vs Diamond Certification

Many buyers confuse these two, but they serve completely different purposes.

If you're buying diamond jewellery, it's ideal to have both a BIS Hallmark (for the gold) and an independent diamond grading report (for the stone).

Common Hallmark Myths

Myth 1: BIS Hallmark Means the Diamond Is Certified

Reality: The BIS Hallmark is only for the purity of gold. It does not grade or certify the diamond.

Myth 2: Every Gold-Coloured Ring Is Hallmarked

Reality: Not everything gold in colour is made of hallmarked gold. Always look for the hallmark and if you cannot find it ask the jeweller.

Myth 3: Higher Karat Is Always Better

Reality: The higher the gold purity, the higher the percentage of pure gold, but that doesn’t necessarily mean the jewellery is better for everyday wear.

For instance:

• 14K Gold is a good compromise between durability and looks.
• 18K gold is richer in colour and has more gold.
• The right one for you depends on your lifestyle and tastes.

Myth 4: Hallmarking Guarantees the Lowest Price

Reality: Hallmarking indicates purity, not price.

The final price of jewellery also depends on:

• Gold weight
• Current gold rate
• Diamond quality
• Design
• Making charges
• Craftsmanship

Warning Signs to Watch For

When buying gold jewellery, be cautious if:

• The jewellery has no visible hallmark.
• The seller cannot explain the purity.
• There is no invoice.
• No information is provided about certification (for diamond jewellery).
• The price seems unrealistically low compared with similar products.

Buying from a transparent jeweller who provides complete product information helps reduce these risks.

Practical Buying Checklist

Before you purchase gold diamond jewellery, ask yourself:

• Can I locate the BIS Hallmark?
• Does the fineness mark match the advertised gold purity?
• Is the diamond independently certified (where applicable)?
• Have I received a detailed invoice?
• Do I understand the warranty, exchange, and after-sales support?
• Am I buying from a trusted retailer?

Answering "yes" to these questions gives you greater confidence in your purchase.

Expert Tips for Buying Hallmarked Gold Jewellery

Whether you’re buying your first diamond ring or adding to your jewellery collection, these simple checks can help you buy with confidence.

1. Always Check the Hallmark

Make sure that the jewellery is BIS Hallmark certified before buying it. It should be marked with the appropriate purity mark and HUID.

Never take a verbal assurance that the jewellery is hallmarked as gospel.

2. Match the Purity to Your Lifestyle

Different gold purities suit different needs.

There's no universally "best" purity—choose the one that matches your lifestyle and budget.

3. Verify the Diamond Separately

If you are buying diamond jewellery, remember that hallmarking is only an indication of gold purity.

Also ask for:

• Diamond certificate (IGI or SGL)
• Invoice
• Warranty information
• Exchange policy
• Buyback policy (if available)

4. Understand the Total Price

The final jewellery price usually includes:

• Gold value
• Diamond value
• Making charges
• GST
• Certification
• Design and craftsmanship

Understanding this breakdown helps you compare products more accurately.

Jewellery Care Tips

Proper care helps maintain the appearance of your hallmarked jewellery for years.

Store Pieces Separately

Keep each item in a soft pouch or a lined jewellery box to prevent scratching.

Remove Jewellery During Certain Activities

Consider removing jewellery when:

• Swimming
• Exercising
• Using harsh cleaning chemicals
• Performing heavy manual work

This helps reduce unnecessary wear.

Clean Gently

Use:

• Mild soap
• Warm water
• A soft brush
• A lint-free cloth

Avoid abrasive cleaners that may damage the finish.

Schedule Professional Inspections

If you wear your jewellery regularly, periodic inspections can help ensure the setting remains secure and identify any maintenance needs early.

FAQ's

What does BIS stand for?

BIS stands for Bureau of Indian Standards, India’s national standards body which is responsible for the hallmarking scheme for gold jewellery.

Does every gold ring have a BIS Hallmark?

Not always. Always inspect the jewellery and ask the retailer about hallmarking before you buy.

What does 585 mean?

585 means that the jewellery is made of 58.5% of pure gold, that is 14K gold.

What does 750 mean?

750 means 75% pure gold or 18K gold.

What does 375 mean?

375 = 37.5% pure gold or 9K gold.

Is 14K gold hallmarked?

Yes, Hallmarked 14K gold jewellery typically carries the 585 fineness mark along with the BIS Hallmark and HUID.

Does BIS certify diamonds?

No. BIS Hallmark confirms the purity of the gold. Diamond quality is assessed separately by independent gemological laboratories such as IGI or SGL.

Can I verify the HUID?

Yes, The HUID is designed to identify individual items of hallmarked jewellery. If you need help, follow the verification process recommended by BIS or consult your jeweller.

Why is 14K gold popular for diamond jewellery?

14K gold is a practical compromise between durability and gold content, and is popular for engagement rings and everyday-wear jewelry.

Is a hallmarked ring more expensive?

The retail price is not determined by the hallmarking itself. Total cost depends on various factors like rate of gold, weight, diamond quality, design and making charges.

Related Buying Guides

If you want to learn more before you buy, these guides can help:

• IGI vs SGL Certification Explained
• Lab Grown vs Natural Diamond Price in India
• Do Lab Grown Diamonds Have Resale Value?
• How Much Does a 1 Carat Lab Grown Diamond Ring Cost in India?
• 925 Silver vs 14K Gold for Daily-Wear Diamond Jewellery

Together, these articles provide a complete understanding of gold purity, diamond quality, pricing, and certification.

Explore Our Collections

Browse our jewellery collections:

• Lab Grown Diamond Rings
• Silver Diamond Earrings
• Silver Diamond Pendants
• Silver Diamond Necklaces
• Men's Diamond Rings
  
• Best Sellers
• New Arrivals

Final Thoughts

One of the easiest and most important checks that you can do when you buy gold jewellery in India is to check for a BIS Hallmark. This gives confidence that the purity of the gold is what is being sold. The HUID also adds to traceability for individual pieces.

Remember, hallmarking and diamond certification go hand in hand while buying diamond jewellery. The hallmark indicates the precious metal, and an independent grading report describes the qualities of the diamond.

Do your homework before you buy, and buy from a jeweller who gives you clear documentation, transparent pricing and reliable after-sales support and you’ll be well placed to make an informed purchase.