This tester is based on the thermal conductivity of diamonds and designed and manufactured specifically for the identification of genuine and false diamond electronic equipment. The test gem must be clean, dry and at room temperature. 

Features:
1)Emits audible sounds to give accurate readings. Diamond indicator will be showed if the stone is a REAL diamond
2)Simple calibration for stones of various sizes
3)Testing platform for loose stones

Specifications:
Weight:160g 
Size:160*40*22mm 
Powered by DC 9V battery x 1 (not included) 

Package Including:
1 x Diamond Tester
1 x Texting Platform 

How to prepare?
1)Mark on the battery
2)Turn the Power Swith On
3)Confirm the Battery Lamp lights up
4)Wait for about 30seconds till the Ready Lamp lights up.