Professional Diamond Tester Pen Kit – High Accuracy Selector

Verify Your Gemstones with Confidence

The Professional Diamond Tester Pen Kit is your go-to tool for quickly and accurately identifying real diamonds from simulants. Whether you're a jeweler, gemologist, collector, or just want to authenticate a stone at home, this compact and easy-to-use tester delivers reliable results every time.

Key Features

• High Accuracy Detection: Instantly identifies genuine diamonds with precise thermal conductivity testing technology.
• LED Light & Audio Indicators: A red LED light illuminates and the audio alert sounds when a real diamond is detected — no guesswork needed.
• Simple One-Touch Operation: Minimal learning curve; just touch the probe tip to the stone and read the result.
• Universal Calibration: Easily adjustable for stones of various sizes, ensuring consistent and accurate readings every time.
• Lightweight & Portable: Slim pen-style design (14 × 4 × 2 cm) fits comfortably in hand and slips easily into a pocket or bag.
• Complete Kit Included: Comes with a dedicated testing platform for loose stones, a protective carrying case, and a detailed user manual.
• Durable ABS Body: Constructed from high-quality ABS material for long-lasting everyday use.

Specifications

• Color: Black
• Material: ABS Plastic
• Power Supply: 1 × 9V DC Battery (not included)
• Item Size: 14 × 4 × 2 cm (5.5 × 1.6 × 0.8 in)

What's in the Box

• 1 × Diamond Selector Tester Pen
• 1 × Loose Stone Testing Platform
• 1 × Protective Carrying Case
• 1 × User Manual

Care & Maintenance Tips

• Always replace the probe sheath when not in use to protect the sensitive tip.
• Replace the battery promptly when the indicator light dims.
• Remove the battery if storing the device for an extended period.
• For best accuracy, perform a calibration check at least once a year.

Made in Mainland China.

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For more information on jewelry authenticity and gemstone standards, visit the NIST Forensic Science resource for trusted measurement and testing guidance.

Frequently Asked Questions

Q: How does the diamond tester pen work?

A: The diamond tester pen works by measuring thermal conductivity. Real diamonds conduct heat differently than glass, cubic zirconia, and other simulants. When the probe tip makes contact with a genuine diamond, the device triggers both a red LED light and an audio alert, confirming authenticity instantly.

Q: Does the diamond tester kit come with a battery?

A: The kit does not include a battery. You will need one standard 9V DC battery to power the diamond selector tester pen. Batteries are widely available at most hardware or convenience stores.

Q: Can this tester be used on loose stones as well as mounted jewelry?

A: Yes! The kit includes a dedicated loose stone testing platform, making it easy to test unmounted gems. The probe tip can also be carefully applied to stones set in jewelry for on-the-spot verification.

Q: Is this diamond tester accurate for all diamond sizes?

A: The tester features simple calibration that accommodates stones of various sizes, from small accent diamonds to larger center stones, ensuring accurate and reliable readings across the board.