Diamond & Moissanite Tester Pen – Gemstone Authenticity Tool

Verify Your Gems with Confidence – Diamond & Moissanite Tester Pen

Whether you're a jeweler, gemstone collector, or simply want to confirm what you're buying or selling, this portable Diamond & Moissanite Tester Pen gives you fast, accurate results in seconds. Using advanced thermal conductivity technology, it distinguishes real diamonds and moissanite from common simulants without causing any damage to your stones.

Key Features

• Dual-Mode Testing: Accurately identifies both genuine diamonds and moissanite — two of the most commonly confused gemstones on the market.
• High-Sensitivity Alloy Probe: The precision-engineered probe ensures reliable, repeatable readings at a 90-degree contact angle.
• Intuitive Audio & Visual Alerts: LED indicator lights and distinct beep tones tell you the result instantly — a beep + light signals diamond, a continuous buzz indicates metal, and no signal means a simulant.
• Durable ABS Housing: Solid, impact-resistant body with a rubber-tipped protective cap keeps the probe safe between uses.
• Heat-Conducting Plate: Simply rest your finger on the plate to activate the thermal circuit — no complicated setup required.
• Compact & Portable: Weighing just 60g and measuring 160×40×23mm, this tester slips easily into a pocket or jewelry kit.
• Leather Carry Case Included: Keeps your tester protected and organized at home, in the shop, or on the go.
• Battery-Powered: Runs on a standard 1×9V 006P battery (not included), so you're never tethered to a power outlet.

How to Use

1. Power on the tester and wait for the warm-up indicator to signal readiness.
2. Place your finger on the heat-conducting plate to complete the circuit.
3. Gently touch the probe tip at a 90-degree angle to the surface of the gemstone.
4. Read the result from the LED lights and audio tone — it's that simple!

Specifications

What's in the Box

• 1 × Diamond & Moissanite Tester Pen
• 1 × Leather Carry Bag
• 1 × User Manual

Note: Battery not included. Only the tester and accessories listed above are included — additional accessories shown in product images are for illustrative purposes only. Please read the user manual before first use.

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Frequently Asked Questions

Q: Can this diamond tester pen detect moissanite separately from diamonds?

A: Yes! This tester is specifically designed as both a diamond tester and moissanite tester. It uses thermal conductivity measurement to distinguish between genuine diamonds, moissanite, and common simulants such as cubic zirconia, giving you clear audio and LED feedback for each result.

Q: Does this tester work on gemstones that are already set in jewelry?

A: Yes, it can be used on both loose gemstones and stones set in jewelry pieces. Simply ensure the probe tip makes clean 90-degree contact with the gem's surface for the most accurate reading.

Q: What battery does the diamond tester pen require?

A: The tester is powered by a standard 9V 006P battery, which is widely available at hardware and electronics stores. Please note the battery is not included in the package.

Q: Is this gemstone tester safe to use on my diamonds?

A: Absolutely. The thermal conductivity testing method is completely non-destructive and non-invasive — it will not scratch, chip, or harm your diamonds or other gemstones in any way.

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.