Diamond testing pen - A portable electronic device for lightweight gemstone hardness testing. Ideal for beginners in jade, morganite and diamond.

1. Even for beginners, it is easy to use.
2. It emits sound to provide accurate readings.
3. If the gemstone is a geuine diamond, it will display the diamond indicator (green light).
4. Metal alarm (a continuous buzzing sound will be emitted when the user accidentally touches metal instead of the gemstone).
5. Large/Small switch for testing diamonds (+/- 8 points)
6. To emit sound to provide accurate readings
7. LCD display screen and LED indicator lights
8. If the stone is a fke crystal, imitations such as cubic zirconia (CZ) will not react. 
Material: Metal, Plastic
Color: Black
Size: 135*40*23mm.
Power Supply: 1*9V battery (included).
Operation Method:
1. Turn on the power. The power indicator light will light up. The instrument will start to preheat and can be used after a few seconds.
2. Place the sample diamond to be tested in the appropriate groove of the support plate, with the flat surface facing upwards. For already set diamonds, there is no ned to put the tray groove in, and you can hold it with your hand.
3. According to the weight and temperature of the tested diamond, move several bright LED lights.
4. Remove the nedle sheath. Hold the instrument with your hand. Touch the conductive plate on the rear cover of the instrument with your right index finger. Make the probe vertical and gently contact the tabletop of the tested diamond.
5. Carefully observe the instrument. If the other emitted dioe lights reflect yellow, when the light moves to the nine dioes and accompanied by a beep, it indicates that the tested diamond is geine. On the contrary, if the light moves to the places where the nine dides are insufficient and there is no accompanying beep, this explains a fae diamond or a fke diamond. 
Contents inside the package: 
1 * Diamond Selector 
1 * Testing Platform 
1 * Briefcase 
1 * User Manual