Digital Craft Professional High Precision LED Pen Diamond Test Jewelry Selector Tester Jewelry Tool Combo Offer Probe and Tester Electronic Hobby Kit

description: 100% brand new and high quality specification: Item Type: Diamond Tester Material: Metal, Plastic Color: Black (shown as photos) Size: (As shown in the picture) 13.5x4x2 cm / 5.31 * 1.57 * 0.79 inch developed by DC 9 V battery x 1 (not included) characteristics: easy to use even for a new beginner make audible sounds to give a precise reading diamond indicator will be shown if the stone is a REAL diamond (Green light) metal alert (continuous hum when the user accidentally touches metal instead of stone) large / small test switch for diamonds +/- 8 points to make sounds to give a precise reading LCD display & LED indicator if it is a fake crystal stone, a simulator like cubic zirconium (CZ), there will be reaction operation methods: