The Thermal Conductivity Meter Diamond Test Pen is an electronic instrument used to identify the authenticity and hardness of diamonds and gemstones. It operates without a battery and is designed for everyday use.
Material: Plastic + alloy probe
Working power supply: 9V battery x 1 (not included)
Identifies authenticity and hardness of diamonds and gemstones
Metal tip of the probe is electrically heated
Buzzing sound indicates contact with diamond surface
Probe must be at a 90-degree angle to the object being tested
Three-color indicator light adjusts to 4th grid for testing
