This diamond tester utilizes the feature that diamond has very high thermal conductivity. It can effectively distinguish natural diamond from its simulants (except for moissanite), so it is able to rule out all other simulants, such as Cubic Zirconia, YAG, GGG, etc. Features: ?Accurate, compact and portable. ?Tone and light indicate diamond ?Linear display gives much more information ?With ultraviolet light to test fluorescent ?reaction of stones ?Metal warning buzzer ?Use DC 9V, 6F22 battery ?Limited one year warranty Illustration: ?Thermal testing probe. ?Ultraviolet Light. ?LED display panel. ?Power indicator. ?Ready indicator. ?Power switch, diamond thermal test or ultraviolet test. ?Beep warning alarm. ?Sensitivity adjustment(calibrated in the factory, no need to adjust). ?Battery cover. ?Metal plate for testing metal. ?Testing probe protective cover. ?Loose stone testing base. Specification: ?Working voltage: DC 9V, 6F22 battery. ?Probe warm up time: about 25 seconds. ?Working time: about 5 hours for continuous use. ?Working temperature: 18C to 30C. ?Size: 1560mm ? 31.5mm ? 21mm(L ? W ? D). ?Weight 48g (not including battery). OEM production is available.