This Presidium tester is a bestseller here at Stuller because of how easy it tests for diamonds and moissanites in a single instrument using thermal and electrical properties.  The Multi Tester III verifies the authenticity of diamonds against moissanite, CZ, and other simulants.  With an ergonomic design and anti-slip grip, you’ll be able to use the tester very easily.  It has a probe tip size of .6 millimeter, which allows the unit to test diamonds as small as .02 carats. Order today at Stuller.com/tools.