High Accuracy Diamond Tester Pen for Gemstone and Jewelry Identification

Test diamonds and gemstones quickly and confidently with this High Accuracy Diamond Tester Pen. Ideal for jewelers, resellers, collectors, and hobbyists, this compact device uses thermal conductivity to distinguish real diamonds from fakes like cubic zirconia. Simple LED indicators and an audible signal let you verify stones in seconds—no guessing or guesswork required.

The pen-style design makes it portable and easy to use whether you're evaluating estate jewelry or sorting through your personal collection. Just turn it on, touch the probe to the gem, and check the result. It's a must-have gemstone testing tool for anyone working with fine jewelry or precious stones.

✅ Key Features

• High accuracy detection using thermal conductivity

• Works on diamonds, CZ, crystals, and other stones

• LED lights and beeping sound confirm test results instantly

• Slim, pen-style design fits in your pocket or jewelry kit

• Simple switch-on operation—no advanced skills required

• Includes test platform and user manual

🔬 Perfect For

• Jewelers verifying diamonds before purchase or repair

• Resellers or estate buyers testing unknown stones

• Hobbyists organizing their gem collections

• Anyone buying secondhand rings, earrings, or necklaces