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Overview

Use with bare hands (avoid gloves)Best results at room temperature (10–35°C)Accurate for diamonds 0.02 carats and largerAfter a 25-second warm-up, hold the conductive panel on the top with your finger, tip the vertical diamond 90 degrees: a red LED flashes and a buzzer sounds when a real diamond is detected

Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast Detection, Portable Gem Checker for Novice & Experts – Battery Included

Model: 730553062926
Web Code: 19585638
Sold and shipped by | 3.0 seller rating (130 reviews)

Available for deliveryAvailable online only

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Warranty

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

【Fast & Accurate Diamond Verification】The high-accuracy diamond tester pen has advanced thermal conductivity; this tester accurately distinguishes real diamonds from common fakes like crystal or cubic zirconia. Ideal for home use, collectors, or resellers

【Built-in UV Light for Fluorescence Detection】Diamond tester professional features a built-in UV light to reveal diamond fluorescence—an important clue in verifying authenticity. Different materials show different reactions under UV, making this feature useful for deeper assessment

【Real-Time Feedback with LED Lights & Sounds】After a 25-second warm-up, hold the conductive panel on the top with your finger, tip the vertical diamond 90 degrees: a red LED flashes and a buzzer sounds when a real diamond is detected

【Testing Tips for Best Accuracy】✦ Use with bare hands (avoid gloves)✦ Best results at room temperature (10–35°C)✦ Accurate for diamonds 0.02 carats and larger

【Compact & Ready for Travel】Diamond tester pen compact size with protective case makes it easy to keep in your bag or drawer, leather pouch keeps your tester safe— perfect for on-the-spot diamond checks at home, in stores, or while traveling.

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

Free standard shipping on all orders.

Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

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  • No restrictions in Canada
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