Diamond Tester Selector II Gemstone Tool LED Audio Checker Jewelry Testing

Thinking of buying a diamond?

Or maybe you’ve got a pile of mystery stones?

This little gadget helps you tell real diamonds from fakes in seconds.

It’s a thermal conductivity tester—just warm it up (takes about 20 seconds), touch the probe to the stone, and listen for the beep.

LEDs light up to show the result.

Works for diamonds and many gemstones.

The body is plastic and metal, comfortable to hold, and runs on a 9V battery (not included).

Dimensions are about 6.5 x 1.5 x 0.75 inches, so it’s pocket-friendly.

Great for jewelers, pawn shops, or just hobbyists who love a deal.

No brand name, but the function is solid.

Whether you're testing estate sale finds or checking gifts, this tool gives you peace of mind.