DescriptionThe product is a Diamond Selector which uses the thermal property of diamonds to test and identify whether the diamond or Gems is REAL with a diamond indicator. Besides, the tool will audible sounds to give accurate reading during. With easy to operate and high quality, it is really a wonderful gadget specially suitable for collectors.Features- Color: Black - Material: Alloy and plastic - Size: 16.5x2.3x4cm - Easy to use even for a new beginner. - LED light and audio result indication. - Accurate and reliable reading. - audible sounds to give accurate reading. - Simple calibration for stones of various sizes. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you!