Flexzion Jewelry Diamond Tester Selector II V2 Gemstone Platform Jeweler LED Tool Portable for Novice and Expert High Accuracy with Carrying Case Battery Operated Professional diamond selector II will indicate genuine diamond or fake. Diamond indicator (GREEN light ), which illuminates if the stone is a REAL diamond Uses large / small switches for testing diamonds LCD display, LED lights, Emits audible sounds to easily differentiate the readings Simple calibration for stones of various sizes. Metal alert ( a long beep when user accidentally touches metal rather than stone) Accurate and reliable reading. Testing platform for loose stones