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Overview: This "Diamond Selector II" has a highly compact design and will help you to tell the difference between a genuine diamond and fake diamond. The cost is not even a fraction of the cost of a diamond, and you will gain piece of mind by knowing that you are buying a real diamond, instead of a cheap knockoff. This tester comes with a leather bag and small testing tray for holding loose stones. Feature: Easy to use even for a new beginner Emit audible sounds to give accurate reading Compensation for ambient temperature Diamond indicator will be showed if the stone is a REAL diamond (Red light) Auto shut-off with a push button switch Metal alert (continuous buzzing sound when user accidentally touches metal rather than stone) Large/small switch for testing diamonds +/- 8 points LCD display & LED indicator If stone is Fake crystal, a simulant such as cubic zirconium (CZ), will be no reaction Specification: Size: 156*41*20mm Power supply: 9V battery (Included) Specially offer an unique 2 sounds and 3 color lamps display system to identify diamonds from imitations. Weight: 100g Package included: 1 x Diamond Selector II Tester 1 x Texting Platform 1 x 9V Battery 1 x Protected Leather Bag