🌍 Worldwide shipping · 30-day returns · Rated Excellent on Trustpilot ★★★★½
Bigamart
Price
$147.99
Home/DIY & Tools/Electrical/Tools & Testers/Multi Testers
GAIN EXPRESS Diamond Tester Pen, Professional Diamond Moissanite Gemstone Tester with UV Ultraviolet Light & Thermal Sensor, Gem Checker Jewelry Tester Diamond Selector for Novice and Expert — image 1
Multi TestersGAIN EXPRESS✓ In stock

GAIN EXPRESS Diamond Tester Pen, Professional Diamond Moissanite Gemstone Tester with UV Ultraviolet Light & Thermal Sensor, Gem Checker Jewelry Tester Diamond Selector for Novice and Expert

★★★★★
$147.99
Worldwide shipping
Fast tracked delivery
30-day returns
Hassle-free returns
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Great service
Thousands of happy customers
About this item
  • 💎 Reliable diamond selector: This diamond tester is unresponsive to imitation crystals and simulants like cubic zirconia and moissanite, making it the go-to choice for retail jewelers, pawn brokers, and chain stores.
  • 💎 Advanced technology: Equipped with ultraviolet light for fluorescent reaction testing, multi-level volume calibration, and audible warning sounds when the probe touches a metal surface.
  • 💎 Convenient features: Compact design, low battery consumption, and the option to use an A/C adaptor for extended indoor use.
  • 💎 Accurate and precise: With a single button press, it can identify genuine "natural" diamonds and distinguish stones as small as 2pt.
  • 💎 Complete set: Comes with a vinyl pouch, testing platform for loose stones, and a comprehensive instruction manual. Brand new and unused.
Product details
Brand
GAIN EXPRESS
Manufacturer
Gain Express Holdings Ltd.

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
★★★★★
Excellent
4.5 average rating
See all reviews →
S
Sigalit
🇮🇱 · January 2026
★★★★★

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
🇦🇺 · November 2025
★★★★★

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 1–2 of 10 reviews

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