Key benefits Fast, reliable identification of diamonds versus moissanite and simulants — reduces time spent on uncertain visual inspection. Simple, repeatable procedure for consistent results: builtin tone and LED indicators show clear outcomes. Portable, batterypowered design for use at the bench, in the store, or on site. What it does Detects diamonds first, then confirms moissanite. If a diamond is detected the unit sounds the buzzer and the green LED lights for about 6 seconds. If moissanite is detected, the tone changes and the LED switches from green to blue in 1/2 second. If the stone is a simulant or nondiamond, no response occurs. Important performance notes accurate testing requires you to continue the test for one second after you first hear the beep before removing the probe from the gemstone (this is because the diamond test completes first). The moissanite test is completed after 1/2 second. Indicator timings: green LED (diamond) ≈ 6 seconds; moissanite detection completes and LED switches to blue after 1/2 second. Batterypowered: product includes batteries and does not use a power cord. Battery and power cord cannot be used at the same time; when a battery is installed the power cord cannot be used. How to use (recommended procedure) 1. Hold the tester with your right hand so your fingers rest on the back metal plate. Use your other hand to hold a metal support or the included metal test plate to provide grounding support. 2. Gently touch the tip of the probe to the center of the gemstone (approximately 250 mg of pressure). Keep the tester perpendicular to the gemstone table. 3. Continue holding the probe for at least one second after you first hear a beep to allow the diamond test to complete. Wait an additional 1/2 second for moissanite confirmation if the tone changes. 4. Read the result: no response = simulant/nondiamond; buzzer + green LED ≈ 6 seconds = diamond; tone change + greentoblue LED in 1/2 second = moissanite. Compatibility and applications Works on loose and mounted gemstones. Grounding the stone via a metal support or test plate is required for reliable results. Practical uses: Jewelry stores and appraisers verifying incoming inventory and sales items. Buyers inspecting preowned or estate jewelry to confirm stone identity before . shops and pawnshops quickly screening stones during intake or work orders. What makes it stand out Clear audio and visual cues (buzzer and LED colors) reduce ambiguity in identification. Short test time and straightforward handling make it suitable for frequent, repeated checks. Battery operation enables mobile use without needing to be tethered to a power source. Safety and handling reminders Do not remove the probe before the required hold times to avoid false readings. Use light, controlled pressure (approx. 250 mg) and keep the probe perpendicular to the stone surface. Use only one power source at a time: either battery (included) or power cord when applicable; both cannot be used simultaneously.