Diamond & Moissanite Tester Pen – Gemstone Authenticity Tool

$37.67 $47.21

Verify Your Gemstones with Confidence

The Diamond & Moissanite Tester Pen is a portable thermal conductivity meter designed to quickly and accurately distinguish real diamonds and moissanite from simulants. Whether you're a jeweler, gemstone collector, or simply want peace of mind before a purchase, this compact testing tool delivers fast, reliable results every time.

Made in Mainland China.

Why You'll Love This Gemstone Tester

High-Quality Build: Constructed with a solid, durable ABS housing, a high-sensitivity alloy probe, a rubber protective cap, and a well-engineered heat-conducting plate for consistent readings.
Fast & Accurate: Uses thermal conductivity technology to distinguish genuine diamonds from common simulants quickly and safely — with no harm to your gemstone.
Simple to Use: Power on, wait for the warm-up indicator, place your finger on the heat-conducting plate, and touch the probe to your gem at a 90° angle. Results appear in seconds.
Intuitive LED & Audio Feedback: Easy-to-read results at a glance — a beep plus LED light indicates diamond; continuous buzzing indicates metal; no signal indicates a simulant.
Ultra-Portable: Lightweight and compact at just 60g, it fits comfortably in your pocket or bag. Includes a stylish leather carry case for protection and portability.
Battery Powered: Runs on one standard 9V 006P battery (not included), making it ready to use anywhere without charging cables.

Technical Specifications

Material: ABS Plastic + Electronic Components
Color: Black
Dimensions: 160 × 40 × 23 mm (6.29 × 1.57 × 0.90 in)
Weight: 60g (2.11 oz)
Package Size: 185 × 60 × 30 mm (7.28 × 2.36 × 1.18 in)
Package Weight: 118g (4.16 oz)
Power: 1 × 9V 006P battery (not included)

What's in the Box

1 × Diamond & Moissanite Tester Pen
1 × Leather Carry Case
1 × User Manual

Note: Please read the user manual carefully before first use. Other accessories shown in product images are not included. Slight color variations may occur due to lighting. Minor dimensional deviations may exist due to manual measurement.

Frequently Asked Questions

Q: Can this diamond tester pen distinguish moissanite from real diamonds?

A: Yes! This tester uses thermal conductivity technology to differentiate between genuine diamonds, moissanite, and common simulants. The audio and LED feedback system clearly communicates what type of stone you're testing, making it ideal for verifying both diamonds and moissanite gemstones.

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

A: No, the battery is not included. The tester requires one standard 9V 006P battery, which is widely available at most hardware or electronics stores. Simply insert the battery, power on the device, wait for it to warm up, and you're ready to test your gemstones.

Q: Is this gemstone tester safe to use on mounted and loose stones?

A: Yes, this tester is safe for use on both loose gemstones and stones mounted in jewelry settings. The testing process is non-invasive and does not damage or alter the stone in any way. For best accuracy, ensure the probe makes clean 90° contact with the gemstone surface.

Q: How portable is this diamond tester?

A: Very portable! At just 60g and with compact dimensions of 160 × 40 × 23 mm, it easily fits in a pocket or bag. It also comes with a leather carry case to keep it protected during travel or storage, making it a great on-the-go tool for jewelers and collectors alike.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.