Portable Diamond Tester Pen with LED Indicator for Gemstone Authenticity

Shop with greater confidence and check stones quickly using this diamond tester pen designed for convenient at-home or professional jewelry checks. This compact diamond authenticity tester uses thermal conductivity with LED indicators and an audible alert to help distinguish diamonds from common simulants such as cubic zirconia. Its straightforward controls make it approachable for beginners while remaining practical for jewelers, collectors, and resellers. Lightweight and portable, it keeps useful testing capability close at hand.

Key Features

• Portable gemstone tester provides LED visual feedback and audible alerts for easy-to-read testing.
• Metal-contact alert helps indicate when the probe accidentally touches a metal setting instead of the stone.
• Large/Small selector supports testing different diamond sizes, while the compact 135 × 40 × 23 mm body is easy to carry.
• Made from metal and plastic and powered by one 9V battery (not included).

Why Choose Our Portable Diamond Tester Pen?

Instead of relying only on visual inspection, this thermal conductivity tester provides immediate light and sound feedback for a more informed preliminary check. Its simple pen-style design, beginner-friendly operation, metal alert, and portable size offer practical value without the bulk of larger professional testing equipment. Comparable listings position this type of tool specifically for jewelry and gemstone authenticity testing.

Perfect For

• Jewelers and jewelry resellers
• Diamond collectors and enthusiasts
• Secondhand jewelry inspections
• Pawn shops and market sellers
• Quick preliminary gemstone checks
• Home jewelry collections

Make every jewelry check simpler and more confident. Add this portable diamond tester to your toolkit and get convenient authenticity screening whenever you need it.