Fast and accurate: if the stone is a diamond, the LED lights up!
Easy to use: simply place the tip of the Jewelry Diamond Test Tool on the gemstone (gentle pressure)
Versatile test: it can test the authenticity of diamonds, sapphires, rubies, crystals, onyxes, emeralds, and other gemstones of all sizes.
Fast and safe: it wont cause any harm to the diamond. At garage sales, flea markets, swap meets and more, the Diamond Tester is a must-have in your toolbox.
Applications: industrial use, circuit boards and printing, industry, medicine, horticulture, diamonds, stamps, jewelry, appraisal, education, geography, home and office.