Quick Warm-up Time: The gem tester features a fast and efficient warm-up time of approximately 25 seconds, allowing you to start working immediately and maximize productivity. Diamond Tester: This combination tester offers stable and accurate performance, detecting and distinguishing diamonds from imitations in just 2 seconds. Retractable Probe Tip: Equipped with a retractable probe tip that ensures even pressure on stones during testing for more reliable results, with a thin 0.6 mm tip capable of testing colorless diamonds as small as 0.02 carats. High Efficiency: Designed for efficiency with an intuitive LCD digital display, enabling quick and efficient operation for streamlined workflow. Easy to Use: Simple to operate without requiring professional expertise; just turn on the detector, place the tip on the stone with gentle pressure to obtain results.