Contents
- 1 Introduction
- 2 What Is HUID in Gold Jewellery?
- 3 Why Was HUID Introduced?
- 4 What Does a BIS Hallmark Include?
- 5 What Does 22K916 Mean?
- 6 Is HUID Mandatory in India?
- 7 How to Verify HUID Using the BIS CARE App
- 8 Why HUID Verification Is Important in Gold Jewellery
- 9 Common Mistakes Buyers Make
- 10 How Jewellers Ensure HUID Compliance
- 11 Role of Trusted Jewellers
- 12 How HUID Protects Resale Value
- 13 Can HUID Be Fake?
- 14 What If HUID Does Not Match?
- 15 Difference Between Hallmark and HUID
- 16 Benefits of BIS Hallmarking System
- 17 Frequently Asked Questions (FAQs)
- 18 Final Thoughts
Introduction
When you buy gold jewellery, you are not just buying design. You are buying trust. You are buying purity. You are buying long-term value.
In India, gold purity is regulated by the Bureau of Indian Standards (BIS). To protect buyers, the government introduced HUID, a unique code for each hallmarked gold item.
But many buyers still ask:
- What exactly is HUID?
- Is it mandatory?
- How do I verify HUID?
- How does the BIS CARE app work?
Let us explain everything in simple and clear terms.
What Is HUID in Gold Jewellery?
HUID stands for Hallmark Unique Identification number.
It is a unique alphanumeric code stamped on every BIS-hallmarked gold jewellery piece.
Earlier, jewellery carried common hallmark stamps. Now, each piece has its own unique identity.
This change makes gold buying safer.
Why Was HUID Introduced?
Before HUID:
- Multiple jewellery pieces could share the same hallmark batch.
- Tracking individual items was difficult.
- Buyers had limited verification options.
After HUID implementation:
- Each jewellery piece has a unique number.
- It can be tracked individually.
- It prevents duplication and fraud.
- It increases buyer confidence.
HUID makes gold buying more transparent.
What Does a BIS Hallmark Include?
A genuine BIS-hallmarked gold jewellery piece contains:
- BIS logo
- Purity mark (like 22K916)
- Jeweller’s identification mark
- HUID number
All four elements must be present.
If even one is missing, you should question the authenticity.

What Does 22K916 Mean?
Many buyers see “916” but do not understand it.
916 means 91.6% pure gold.
Here is a simple breakdown:
- 24K = 99.9% pure gold
- 22K = 91.6% pure gold (916)
- 18K = 75% pure gold
Most wedding jewellery in India is 22K (916).

Is HUID Mandatory in India?
Yes.
The Government of India made hallmarking mandatory for gold jewellery in phases.
HUID-based hallmarking is compulsory for gold jewellery sold in notified districts.
This rule protects consumers from buying under-pure gold.
Always insist on HUID.
How to Verify HUID Using the BIS CARE App
Verifying HUID is simple.
You do not need technical knowledge.
Follow these steps carefully.

Step 1: Download the BIS CARE App
The BIS CARE app is available on:
Search for “BIS CARE”.
Install the official app developed by BIS.
Step 2: Open the App
After installation:
- Open the app
- Select “Verify HUID”
You do not need to create an account for basic verification.
Step 3: Enter the HUID Number
Look at your jewellery piece.
You will find a six-digit alphanumeric code engraved on it.
Enter this code exactly as shown.
Be careful while typing.
Step 4: Check the Details
If the jewellery is genuine, the app will show:
- Purity grade (22K, 18K etc.)
- Registration number
- Assaying centre details
If no record appears:
- The jewellery may not be hallmarked
- The code may be fake
- You should avoid purchase
This process removes dependency on verbal assurance.
Why HUID Verification Is Important in Gold Jewellery
Gold is expensive.
Even a small purity difference can mean financial loss.
For example:
If 22K gold is sold as 20K gold, the purity difference affects resale value.
HUID ensures:
- Correct purity
- Transparency
- Legal compliance
- Traceability
Verification takes less than one minute.
It protects your money.
Common Mistakes Buyers Make
Many buyers still make avoidable mistakes.
Here are common errors:
1. Ignoring the Hallmark
Some buyers trust only brand reputation.
Always verify physically.
2. Not Checking HUID
Some people see 916 and stop there.
Always check the unique code.
3. Not Using the BIS CARE App
The app exists for your protection.
Use it.
4. Focusing Only on Design
Design is important.
Purity is more important.
How Jewellers Ensure HUID Compliance
Responsible jewellers:
- Send jewellery to BIS-recognised assaying centres
- Get items tested for purity
- Receive HUID codes
- Stamp the jewellery properly
- Maintain transparency in billing
A reputed jewellery store will never hesitate to let you verify HUID.
If a seller avoids verification, consider it a red flag.
Role of Trusted Jewellers
Buying gold is not just a transaction.
It is a relationship.
Customers prefer jewellers who:
- Provide certified purity
- Encourage HUID verification
- Offer transparent billing
- Explain purity grades clearly
For customers evaluating the best jewellery shop in Madurai, trust, certification, and transparency should matter more than discounts.
At Sri Ganesh Nagaikadai, we encourage every customer to verify HUID using the BIS CARE app before purchase.
How HUID Protects Resale Value
Gold resale depends on purity.
When your jewellery has verified HUID:
- Resale becomes smoother
- Exchange value remains fair
- Buyers trust the authenticity
Without HUID, resale negotiations become difficult.
Can HUID Be Fake?
It is difficult but not impossible.
That is why verification through the BIS CARE app is critical.
Never rely only on stamping.
Digital verification confirms authenticity.
What If HUID Does Not Match?
If details do not match:
- Do not proceed with purchase
- Ask the jeweller for clarification
- Report through BIS CARE complaint option
Consumer awareness strengthens the system.
Difference Between Hallmark and HUID
Hallmark refers to certification of purity.
HUID is the unique identity code for each piece.
Hallmark is the certificate.
HUID is the tracking number.
Both are important.
Benefits of BIS Hallmarking System
The hallmarking system ensures:
- Standardised purity testing
- Consumer protection
- Reduced fraud
- Legal accountability
- Increased trust in gold trade
It improves overall industry credibility.
Frequently Asked Questions (FAQs)
What is HUID in gold jewellery?
HUID is a Hallmark Unique Identification number stamped on BIS-hallmarked jewellery. It allows buyers to verify purity digitally.
Is HUID mandatory in India?
Yes. HUID-based hallmarking is mandatory for gold jewellery sold in notified regions of India.
How do I check gold purity online?
You can download the BIS CARE app and enter the HUID number to verify purity details.
What happens if jewellery has no HUID?
Jewellery without HUID may not be legally compliant. Avoid purchasing such items.
Can I verify gold without the BIS CARE app?
The BIS CARE app is the official and safest way. Physical hallmark checks alone are not enough.
Is 916 gold pure?
916 gold means 91.6% purity. It is standard 22K gold used for most wedding jewellery.
Does HUID guarantee resale value?
HUID improves resale trust because purity is verified and traceable.
Final Thoughts
Gold buying should never depend only on emotion.
It should depend on verification.
HUID has made gold jewellery safer for buyers.
The BIS CARE app makes verification simple and fast.
Always:
- Check the hallmark
- Confirm the HUID
- Verify digitally
- Buy from transparent jewellers
Purity protects your wealth.
Verification protects your peace of mind.
Gold lasts generations.
Make sure its authenticity does too.
