If you’re planning to sell your gold in Houston, one of the biggest questions you might have is:
Professional gold buyers use different methods to check:
- Purity (karat)
- Authenticity
- Metal composition
The two most common methods are:
- XRF Testing (modern method)
- Acid Testing (traditional method)
In this guide, we’ll explain both in simple terms so you know exactly what happens when you sell your gold.
What is XRF Gold Testing?
XRF stands for X-ray Fluorescence, a modern technology used by professional gold buyers.
How it works:
- A machine shoots X-rays onto your gold
- The gold emits energy signals
- The device analyzes these signals to determine metal composition
In simple words:
It reads what your gold is made of — instantly.
Key Features:
- Results in 3–5 seconds
- Accuracy up to 0.01%–0.1%
- Shows exact % of gold and other metals
Advantages of XRF Testing
- Non-destructive Your jewelry is not scratched or damaged
- Highly accurate Provides precise gold purity and composition
- Instant results Takes only a few seconds
- Professional & transparent You can see results on screen
- Tests mainly the surface (up to ~30 microns depth)
- Very thick gold-plated items can sometimes mislead results
That’s why most modern gold buyers prefer XRF technology
Limitations of XRF
This is why experienced buyers often combine methods.
What is Acid Testing?
Acid testing is a traditional method that has been used for decades.
How it works:
- The buyer scratches your gold on a black stone
- Applies different acids (for 10K, 14K, 18K, etc.)
- Observes the reaction
Gold does not react easily with acid, while fake metals do
Advantages of Acid Testing
- Low cost
- Simple and quick
- Widely used in small shops
Disadvantages of Acid Testing
- Slight damage to jewelry (scratch mark)
- Less accurate (approximate results)
- Depends on operator experience
- Can be fooled by gold plating
Since it only tests the surface, fake items may pass if not tested properly
XRF vs Acid Test (Quick Comparison)
| Feature | XRF Testing | Acid Test |
|---|---|---|
| Accuracy | Very High (Precise metal composition) | Moderate (Approximate results) |
| Speed | Results in seconds | Quick but manual process |
| Damage to Jewelry | No damage (non-destructive) | Slight scratch required |
| Cost of Equipment | High (advanced machine) | Low (simple tools) |
| Reliability | Highly reliable | Depends on user experience |
| Testing Depth | Surface-level analysis | Surface (can go deeper with filing) |
Which Method is Better?
XRF is clearly the better option for most situations because:
- It gives precise results
- It does not damage your gold
- It builds trust and transparency
- As a secondary test
- To verify deeper layers when needed
However…
Acid testing is still useful:
Many professional gold buyers actually use both methods together for maximum accuracy
Why This Matters When Selling Gold
When you sell your gold, the price depends on:
- Weight
- Purity (karat)
- Current gold price
Even a small difference in purity can change your payout significantly. Different gold items can have different values depending on purity and condition. Learn more about the types of gold we buy to understand what you can sell.
That’s why choosing a buyer who uses accurate testing methods is critical.
Warning: How Some Buyers Underpay
Some low-quality buyers may:
- Use outdated testing methods
- Skip proper verification
- Miscalculate purity
Result: You get less money than you deserve
Our Approach at Gold Buyers Houston
At Gold Buyers Houston, we believe in:
- Transparent testing process
- Advanced technology (XRF testing)
- Accurate evaluation
- No hidden deductions
We test your gold in front of you so you know exactly what you’re getting.
Sell Your Gold with Confidence in Houston
If you’re looking to sell:
- Gold jewelry
- Coins
- Broken gold
- Scrap gold
Visit us today for a free gold evaluation
Frequently Asked Questions (FAQ)
Is XRF testing safe?
Does acid testing damage gold?
Which test is more accurate?
Can fake gold pass these tests?
Should I trust gold buyers who don’t test properly?
- Avoid scams
- Get the best price
- Sell with confidence
Always choose a trusted gold buyer who uses modern, transparent testing methods.
Our Location – Gold Buyers Houston
Phone
(832) 225-6484