This diamond tester doesn't react on stones like fake crystals, or simulants such as cubic zirconium, when the probe touches the surface. It is the easiest answer for the vast majority of retail jewelers, pawn brokers and chain stores when faced with the decision of which diamond selector to buy. Why? Because it works reliably and share the most advanced diamond selector technology on the market. The diamond tester utilizes the feature that diamond has very high thermal conductivity. It can effectively and quickly distinguish natural diamond from all models of diamond simulants and metals, except synthetic Moissanite which has similar thermal conductivity to Diamond. There are some diamonds in the market these days which the diamond selector detects even if the diamond is not the genuine one. Have a most reliable & user friendly diamond selector, get the JEM-II diamond tester!
Equipped with ultraviolet light to test fluorescent reaction of stones.
Easy calibration with Level Meter Volume to match different sizes of stones. Can distinguish stones as small as 2pt. Can be connected with A/C adaptor for long time indoor use. One year limited manufacturer's warranty.
DC 9V, 6F22 battery, or AC adaptor(110V- 240V, DC 9V,optional)