XRF Gold Purity Testing in Hyderabad
Know your gold’s purity before deciding to sell. V-Gold uses XRF testing to assess the metal composition of gold items and help explain the purity used in your buying offer.
Whether you bring old jewellery, broken ornaments, coins or other eligible gold items, purity testing helps you understand why items of the same weight can have different values.
What Is XRF Gold Purity Testing?
XRF stands for X-ray fluorescence. It is a method used to analyse the elemental composition of a material.
During testing, the instrument directs X-rays at the selected area of your gold item. The material produces characteristic signals that the instrument analyses to estimate the elements present and their proportions.
For gold jewellery, this can help identify gold and alloying metals such as silver and copper. The result supports the purity assessment used during valuation.
XRF assesses composition; a separate weighing scale measures weight.
Why Gold Purity Testing Matters
Jewellery is commonly made from gold mixed with other metals to improve strength and suitability for everyday use.
This means two items weighing 10 grams can contain different amounts of gold. An item with higher gold purity generally contains more gold than a lower-purity item of the same net weight.
Testing helps you:
Understand the purity assessed for your item.
Compare the result with its markings.
Identify differences between items or components.
Understand the buying rate applied.
Review the valuation before accepting an offer.
Read our Gold Valuation in Hyderabad guide to see how purity, weight and rate work together.
How the XRF Testing Process Works
1. Initial Examination
The evaluator checks the item’s condition, visible markings and construction.Stones, attachments, solder joints, coatings and different components may affect how the item should be assessed. Tell the evaluator if you know the item has been plated, repaired or modified.
2. Weight Measurement
The item is weighed separately. Gross weight includes the entire item, while the weight used for gold valuation must account for excluded non-gold components.Purity testing does not determine the weight of stones, beads or fillers.
3. Selection of the Testing Area
A suitable area is positioned for analysis. The selected area matters because jewellery can contain different materials in different places.For example, a chain, clasp and solder joint may not have identical compositions. Additional readings may be needed where differences are suspected.
4. XRF Analysis
The instrument analyses the selected area and produces a composition result.The evaluator should explain the gold-content reading and how it relates to the purity assessment. A result from one area should not automatically be treated as proof that every part of a complex item has the same composition.
5. Result Explanation
Before valuation, ask which purity result will be used and whether further checks are required.The final buying offer should explain the assessed purity, net gold-alloy weight, applicable buying rate and any deductions.
What Should Customers See and Understand?
A clear testing explanation should cover:
| Detail | What to ask |
|---|---|
| Testing area | Which part of the item was analysed? |
| Gold-content result | What gold percentage did the reading indicate? |
| Purity assessment | Which purity is being used for valuation? |
| Other components | Were clasps, joints or different parts considered? |
| Additional checks | Is further assessment needed? |
| Buying rate | Does the applied rate match the assessed purity? |
Ask the evaluator to explain the result in plain language. If a reading differs from the item’s marking, ask how that difference will be investigated before making a decision.
Is XRF Testing Non-Destructive?
XRF measurement itself is non-destructive. It does not require melting, cutting or dissolving the item to obtain a reading.
However, testing and sample preparation are separate steps. Some items may require additional assessment or surface preparation to investigate a coating or an inconsistent result.
Ask whether any preparation is proposed and whether it could leave a mark. Any procedure that could alter your jewellery should be explained before it takes place.
Understanding Gold Purity Grades
Gold purity can be expressed in karats or fineness. Fineness describes the proportion of gold in parts per thousand.
| Common designation | Fineness | Gold content |
|---|---|---|
| 24K fine gold | 999 | 99.9% |
| 22K | 916 | 91.6% |
| 18K | 750 | 75.0% |
| 14K | 585 | 58.5% |
These are common designations, not a guarantee that every tested item will return exactly these figures. Jewellery may produce an intermediate reading or different results across components.
A hallmark is useful information, while the testing result provides information about the area assessed. Any discrepancy deserves a clear explanation.
What Are the Limitations of XRF Testing?
It Assesses the Tested Surface Region
XRF does not analyse every part of an item through its full thickness. A reading may not represent material hidden beneath the tested surface.
Plating Can Affect the Result
Gold plating or another surface treatment can influence the reading. A high surface gold reading alone does not prove that the entire item is solid gold.
Different Parts May Have Different Purities
Clasps, solder joints and repaired sections can differ from the main jewellery body. A single reading may not represent all components.
Shape and Positioning Matter
Curved, small or irregular surfaces can affect measurement conditions. Suitable positioning and experienced interpretation are important.
Equipment and Method Matter
Calibration, instrument settings, measurement conditions and operator practice affect the quality of the assessment.Where results are inconsistent or the item’s construction raises questions, additional testing may be appropriate. XRF should be used with physical examination and professional judgement.
How Purity Testing Affects Gold Valuation
Purity is one part of the calculation. Your offer also depends on the net gold-alloy weight, buying rate and any disclosed deductions.
When the buying rate already matches the assessed purity:
Final offer = Net gold weight × Matching buying rate − Disclosed deductions
Do not multiply by purity again when the rate already includes the purity adjustment.
For example, two items of equal net weight may receive different offers if their assessed purities differ. Compare the complete calculation rather than the purity reading alone.
Learn more in our Gold Valuation Guide and Best Gold Price Guide.
Frequently Asked Questions
The XRF measurement itself does not require cutting or melting. If surface preparation or another test is proposed, ask whether it could alter the item before agreeing.
XRF can provide useful composition information, but plating can influence surface readings. Further assessment may be needed to establish what lies beneath the coating.
No. XRF assesses elemental composition. A separate scale measures weight.
A hallmark provides important information about the declared purity. Testing can help assess the item presented for valuation. Differences between markings and readings should be explained and investigated.
Yes. Solder, clasps, repairs or other components can differ from the main body. Additional readings may help assess those differences.
No. An XRF composition reading is not, by itself, a BIS hallmark or an independent certification of the entire item.
Understand Your Gold Purity at V-Gold
Get a clear explanation of your gold’s assessed purity and how it contributes to your buying offer.
Visit a V-Gold branch in Hyderabad with your eligible gold items and ask about the testing process, results and valuation.