How to Use a Pen Diamond Tester Correctly

Understanding the Pen Diamond Tester

A pen diamond tester is a handy tool for anyone looking to quickly verify whether a stone is a real diamond. It’s a compact device that checks the thermal conductivity of a gemstone, distinguishing diamonds from most simulants. However, to get accurate results, you need to use it correctly. Here’s a step-by-step guide to help you make the most of your pen diamond tester. For alternative methods, learn quick ways to use a diamond checker.

Step 1: Calibration

Before you begin testing, calibrate your pen diamond tester. This step is crucial for accurate readings.

1. Turn on the device: Most pen testers have a power button. Switch it on and wait for the device to warm up. Some models will beep or display a light when ready.
2. Set the tester for your environment: If your tester has an adjustment for ambient temperature, set it according to your room conditions. This helps account for temperature variations which can affect readings.
3. Test with a known diamond: If possible, use a diamond of known authenticity to check that the tester is functioning correctly. For a quick initial check, learn how to do the diamond fog test correctly.

Step 2: Warm-Up

Allow the tester to warm up before using it. Most devices need a minute or two to stabilize after turning on.

• Check the indicator light or sound: Some testers come with a light or sound notification to signal readiness. Ensure these indicators show the tester is prepared before proceeding.

Step 3: Correct Probe Angle

Holding the tester at the right angle is essential for accurate results.

• Hold the tester perpendicular to the stone’s surface. This angle ensures effective contact between the probe and the stone.
• Apply gentle pressure: Press the probe gently against the stone. Excessive force can damage both the tester and the gemstone.

Step 4: Testing Mounted Stones

Testing mounted stones requires extra care.

1. Ensure the stone is clean: Dirt and oil can interfere with readings. Clean the stone gently with a soft cloth.
2. Check the setting: Make sure the metal setting does not contact the probe. Metals can conduct heat and lead to false readings. Learn more about how diamond testers work and their limits.
3. Test from multiple angles: If possible, test different facets of the stone to ensure a consistent result.

Mistakes That Give False Readings

Avoid these common mistakes to ensure your readings are as accurate as possible: explore diamond tester price tiers and options.

• Testing in extreme temperatures: Hot or cold environments can affect a tester’s performance. Use it in a stable room temperature.
• Testing stones with similar conductivity: Some simulants like moissanite can pass basic thermal tests. Consider using a pen tester alongside other verification methods. Learn more about how diamond tester pens detect real diamonds.
• Rushed warm-up: Not letting the tester fully warm up can lead to inaccurate results.

When to Use a Pen Tester

A pen diamond tester is great for a quick first check, especially when paired with the Diamond Tester app for an AI-based photo analysis. However, for buying, selling, or insuring valuable pieces, always seek an independent appraisal or a lab report from a recognized institution like GIA or IGI.

FAQ

How accurate is a pen diamond tester?

Pen diamond testers are generally accurate for separating diamonds from most simulants. However, they can be fooled by moissanite and some synthetic stones. Use them as a preliminary test and follow up with professional verification for important transactions.

Can I use a pen diamond tester on a mounted stone?

Yes, but be careful. Ensure the probe only touches the stone and not the metal setting. Clean the stone’s surface before testing to avoid false readings due to dirt or oil.

What should I do if my pen tester gives inconsistent results?

If results are inconsistent, recalibrate the device, ensure it’s properly warmed up, and test in a controlled environment. For further clarity, consider using the Diamond Tester app for an additional layer of analysis.

Why does my tester beep or flash?

Beeping or flashing usually indicates a positive result for diamond. Consult your tester’s manual for specific codes, as different models may have different alerts.