Description: This diamond tester uses probe heating chip to detect the authenticity of diamonds, which has high accuracy and quick response speed. You can easily differentiate the results by the 3-color indicator, and this diamond tester is lightweight and compact in size, which is portable and easy to operate. Made of high-quality ABS and metal, this diamond tester is durable. It is 16.1cm long, 4.03cm wide and 2.23cm high. It is used to identify the authenticity of diamonds and the hardness of some gems. Item Name: Diamond Tester Material: ABS,Metal Power Supply: 1 x 9V Battery (Not Included) Size Details: Size: 16.1cm x 4.03cm x 2.23cm/6.34" x 1.59" x 0.88" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Diamond Tester