Function: 1. This diamond tester has a very compact design and will help you distinguish a real diamond from a fake diamond. 2. This tester comes with a PU case and a small test platform to hold loose stones. 3. LED and sound score indication. 4. Simple calibration for stones of different sizes. 5. Easy to use even for a beginner. Specification: Characteristics: This diamond tester has a very compact design and will help you distinguish a real diamond from a fake diamond. This tester comes with a PU case and a small test platform to hold loose stones. LED and sound signaling of the result. Simple calibration for stones of different sizes. Easy to use even for a new beginner. A green indicator will be displayed if the stone is a real diamond. It will make a continuous buzzing sound when the user accidentally touches the metal rather than the stone. Specification: Material: plastic Color: shown as pictures Size: approx. 16*4*2.1 cm/6.3*1.57*0.83 inch Weight: 160g Type: Jewelry Tool List of packages: 1 * Diamond Tester 1 * Instructions 1 * test platform