Description of π Lotustech Diamond Tester: Highly Accurate Diamond Tester Pen for Novices and Experts - Black, Battery Included
[Easy to Use]: Real Diamond will Emits sounds and lights >=9. [Intuitive Design]: Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9. [fast and safe ]: This diamond selector tester designed for quick, precise, and safe diamond testing. No harm to diamonds. [Battery included]: Our diamond tester is powered by DC 9V battery and the battery is included. [Service]: If you have any questions about use, please contact us. We will explain in detail. Professional equipment, the use method needs to learn slowly.