Medhira Pramanik
12.12.2025
When it comes to buying or selling gold, trust is everything. At Rahul Refinery — recognized as the Best Gold Buyer in Kolkata — we know how crucial it is for you to be sure that your gold is authentic, accurately hallmarked, and valued correctly. Many people visit us with one common question: Can hallmark jewellery ever be fake?
This guide will help you understand the truth about hallmarking, how to identify original BIS Hallmark, and how our services ensure 100% transparency, safety, and correct valuation.

At Rahul Refinery, we provide a warm, reliable, and transparent platform where you can confidently sell your gold, silver, or diamond jewellery. With years of experience, certified testing machines, and a customer-first approach, we ensure your experience is smooth and trustworthy from start to finish. Our mission is simple:
To offer the highest market value for your gold with complete honesty, accuracy, and transparency.
Hallmarking was introduced to protect consumers from fraud and ensure purity standards. However, with the rise of imitation practices, fake hallmark jewellery has become a growing concern.
Even though BIS hallmarking is regulated, dishonest sellers sometimes use:
This makes it difficult for customers to identify whether their jewellery is genuinely hallmarked. At Rahul Refinery, we frequently test jewellery that looks hallmarked but turns out to have lower purity. This is why proper hallmark verification is extremely important.
The Bureau of Indian Standards (BIS) introduced the 6-digit Hallmark Unique Identification (HUID) system to ensure complete traceability. Every original hallmark now MUST include HUID.

Always check these before trusting any hallmark:
1. BIS Logo
A genuine BIS logo looks sharp and clear, featuring a distinctive triangular mark with a dot.
Fake hallmarks often have:
2. Purity Mark (Carat)
Original purity marks include:
If the carat marking appears smudged, misaligned, or unclear, it may not be genuine.
3. HUID Number (6-Digit Code)
This is the most important authentication element.
Each hallmarked item has a 6-digit alphanumeric code, which can be verified online.
Step-by-step:
If the information doesn’t match or no data appears, the jewellery is not properly hallmarked.
When you sell your jewellery, its purity decides the final valuation. Fake hallmark jewellery will have lower purity than marked, which reduces its price drastically.
At Rahul Refinery, the Best Gold Buyer in Kolkata, we immediately verify your jewellery purity through:
This ensures that you always receive the correct market price.
We offer a complete range of gold buying and testing services to ensure a safe and fair selling experience.
Gold Buying Service
Sell your:
We buy all forms of gold at the highest price based on live market rates.
Silver and Diamond Buying
Our valuation experts ensure accurate assessment of:
Purity Testing (Free for All Customers)
With advanced XRF machines, your jewellery is tested without damage.
You see the purity LIVE in front of your eyes.
Instant Payments
Once your gold is tested and valued, payment is made immediately through:
We take pride in being recognized as the most trusted and Best Gold Buyer in Kolkata, thanks to our dedication to customer satisfaction.
1. 100% Transparent Valuation
Everything is tested in front of the customer — nothing hidden.
2. Highest Price Guarantee
We offer the best market price based on real-time live gold rates.
3. Certified Testing Machines
International XRF technology ensures accurate purity results.
4. Safe & Professional Environment
Private cabins, secure premises, and CCTV-monitored testing.
5. Instant Secure Payments
Cash or digital payments within minutes.
6. Trusted by Thousands
Over thousands of customers across Kolkata prefer us for our honesty and reliability.
You may consider selling when:
Selling gold at the right time helps you get maximum benefit from live market rates.
1. Can hallmarked jewellery ever be fake?
Yes. Fake hallmarking exists. Always verify using the BIS HUID number to confirm authenticity.
2. How do I check if a hallmark is original?
Look for the BIS logo, carat mark (916, 750, 585), and a 6-digit HUID code. Verify using the BIS Care App.
3. Is HUID mandatory for all hallmarked jewellery?
Yes, since 2023, all hallmarked items must include HUID.
4. Do you charge for purity testing?
No. Rahul Refinery provides free XRF purity testing for all customers.
5. How do you decide the gold price?
We use live market rates displayed in real-time, ensuring the highest price for your gold.
Hallmark jewellery can be faked—but with the right knowledge and the right partner, you can protect yourself. At Rahul Refinery, the Best Gold Buyer in Kolkata, we help you verify your jewellery properly, understand its purity, and receive the highest value with complete transparency.
Whether you want to check your hallmark, sell your gold, or simply understand its purity, we are here to serve you with honesty and warmth.
Visit Rahul Refinery today — Kolkata’s most trusted name for gold buying.
You can contact us anytime or book an appointment for a free purity check.