Diamond tester, professional high-precision diamond tester pen for jewelry, portable gold testing kit

User-friendly operation: Simple one-button operation with clear LED and audible indicators makes it easy for both beginners and professionals to use.

Battery comparison: Powered by standard batteries (not included), the tester is always ready to use with the required cords or charge.

High-precision testing: Quickly detects genuine diamonds with precision thermal conductivity technology, perfect for testing loose stones or setting jewelry.

Versatile testing tool: Ideal for diamonds, it also provides a general indication for other stones. A must-have tool for jewelry makers, collectors, and dealers.

Compact and portable: Lightweight and pocket-sized, this tester is easy to carry anywhere, ensuring the authenticity of gemstones on the go.