The world’s smallest and most portable moissanite tester is now available from Austron. The Pocket-Mate M is easy to use, reliable, and accurate. It operates using a single AA-size battery (either alkaline or NiCad). As an added bonus, the unit is shipped with a Ni-Cad battery and charger. The tester also comes with a limited lifetime warranty. Austron Corp., 27049 Rio Bosque, Valencia, CA 91354; (877) AUSTRON.