Diamond Tester Machine Portable Gemstone Selector Tool, Tester Pen 9V Black

This portable diamond tester uses thermal conductivity to quickly verify whether stones are genuine or imitation, making it practical for anyone who buys, sells, or inherits jewelry. The compact pen design operates with a single button and LED display, working with a 9V battery to deliver results in seconds. Whether you're assessing a family heirloom, considering a purchase, or simply curious about stones in your collection, this straightforward tool offers reliable testing without requiring professional expertise.