The SAM by Presidium will enable you to distinguish diamonds against a wider range of moissanites than ever before.  The tester also distinguishes against new “low electrical conductivity moissanite” made in various countries, thanks to its thermo-electrical probe.   It also features faster testing time and no waiting between tests.  Test stones as small as 0.1 carat with technology that doesn’t compromise on safety.  Order today at Stuller.com/tools.