Professional Diamond Tester Pen Kit | High Accuracy Selector

Identify Real Diamonds Instantly with Professional Accuracy

Whether you're a jeweler, gemologist, or jewelry enthusiast, this Professional Diamond Tester Pen Kit gives you fast, reliable results every time. With both LED light and audio indicators, you'll know within seconds whether a stone is a genuine diamond — no guesswork, no magnification required.

Key Features

• Dual-Indication System: A red LED light illuminates and an audio alert sounds when a genuine diamond is detected — clear, immediate feedback every time.
• High Accuracy: Precise thermal conductivity sensor delivers accurate and reliable readings for stones of various sizes.
• Simple Calibration: Easy one-step calibration suitable for both mounted and loose gemstones.
• Included Testing Platform: Specifically designed platform for testing loose stones — no extra accessories needed.
• Lightweight & Portable: Compact pen-style design with a convenient carrying case makes it ideal for on-the-go use.
• Complete Kit: Everything you need is included right out of the box.

Specifications

• Color: Black
• Material: ABS
• Power Supply: 1 × DC 9V Battery (not included)
• Item Size: 14 × 4 × 2 cm (6.6 × 1.6 × 0.8 in)
• Country of Origin: Made in Mainland China

Package Contents

• 1 × Diamond Selector Tester Pen
• 1 × Testing Platform (for loose stones)
• 1 × Carrying Case
• 1 × Detailed User Manual

Care & Maintenance Tips

• Handle the probe tip with care — it is the most sensitive component of the device.
• Always replace the cap/sheath over the probe when not in use.
• Replace the 9V battery promptly when the indicator light becomes dim.
• Remove the battery if storing the device for an extended period.
• For best results, calibrate the tester at least once a year.

Explore More Jewelry & Craft Tools

Looking for more ways to create or assess your jewelry and gemstone collection? Check out these popular picks from our store:

• Diamond Painting Kits

Authoritative Resource

For more information on gemstone identification standards and consumer protection when purchasing jewelry, visit the FTC Jewelry Industry Guides — a trusted resource for understanding gemstone labeling and seller obligations.

Learn more: Jewellery design

Frequently Asked Questions

Q: What type of stones can the diamond tester pen detect?

A: This diamond tester pen is designed to identify genuine diamonds based on thermal conductivity. It works on both mounted (set in jewelry) and loose stones. Note that moissanite and some other gemstones may produce similar readings, so cross-testing with additional methods is recommended for definitive authentication.

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

A: No, the diamond tester kit does not include a battery. You will need to supply one standard 9V DC battery to power the device before use.

Q: Is this diamond selector suitable for beginners?

A: Absolutely! The diamond tester pen features easy one-button operation, clear LED and audio indicators, and a detailed user manual — making it straightforward for both beginners and professionals to use confidently.

Q: What is included in the diamond tester kit?

A: The kit includes the diamond selector tester pen, a dedicated testing platform for loose stones, a portable carrying case, and a comprehensive user manual — everything you need to start testing right away.