How Is Gold Purity Tested? 5 Methods Every Seller Should Know (2026 Guide)

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Learn how gold purity is tested before selling your jewellery. Discover XRF testing, hallmark checks, acid tests, and how to avoid being cheated.

Labels
Gold Purity, Gold Testing, XRF Gold Testing, Sell Gold Kolkata, Gold Valuation, Jewellery Xpert, Hallmark Gold

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How Is Gold Purity Tested? 5 Methods Every Seller Should Know

If you're planning to sell old gold jewellery, one question matters more than anything else:

"How do I know the purity test is accurate?"

Many people simply trust whatever the buyer tells them. But understanding how purity is actually tested can help you avoid costly mistakes.

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1. Hallmark Inspection

The first step is checking whether the jewellery carries a BIS hallmark.

A hallmark is a good sign—but it isn't the final answer.

Unfortunately, fake hallmarks also exist. That's why professional testing is still necessary.

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2. XRF Testing (The Most Reliable Non-Destructive Method)

Professional gold buyers often use an XRF (X-Ray Fluorescence) analyzer.

This machine measures the metal composition without scratching, cutting, or damaging your jewellery.

It quickly identifies:

• Gold purity
• Silver content
• Copper content
• Other alloy metals

This is one of the most transparent methods available.

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3. Acid Testing

Some buyers still use acid testing.

A small scratch is made on a testing stone, and special acids are applied to estimate purity.

While useful, it is generally less precise than modern XRF testing.

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4. Weight Verification

Many customers assume the entire jewellery weight is pure gold.

That's rarely true.

Professional valuation separates:

• Stones
• Pearls
• Enamel
• Non-gold components
• Solder

Only the actual gold content is valued.

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5. Live Market Rate Calculation

After purity and net gold weight are confirmed, the current live gold price is applied.

The final valuation depends on:

• Purity (22K, 18K, 14K, etc.)
• Net gold weight
• Current market rate

Not just the jewellery's appearance.

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Common Mistakes People Make

❌ Trusting only the quoted price per gram.

❌ Never asking how purity was tested.

❌ Assuming hallmarked jewellery always receives the highest valuation.

❌ Selling to the first buyer without comparing.

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Our Advice

Before selling your jewellery, always ask:

"Can you show me how the purity is being tested?"

A transparent buyer should always be willing to explain the valuation process.

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Jewellery Xpert – Transparent Jewellery Valuation in Kolkata

At Jewellery Xpert, we believe customers should understand how their jewellery is valued—not just what it's worth.

We provide:

• Transparent purity testing
• Professional weight verification
• Independent jewellery valuation
• Gold, diamond and antique jewellery assessments

Serving customers across Kolkata.

🌐 www.jewelleryxpert.com
📞 8617282712