Answer:
With tanzanite you will want to avoid ultrasonic (vibrating) cleaners and solutions, as well as high heat (such as from a jeweler's torch). Normally, a solution of mild soap (no bleaching agents) and water will do the trick for cleaning. Be sure to rinse thoroughly and dry. Here's a link to JTV's care and treatment chart.
http://www.jtv.com/library/gemstone...Thanks, Dana
JTV.com Community Manager