I agree. The Moissanite rings look fantastic. To my eye, the CZ and the Moissanite materials are excellent. However, since Moissanite currently sells for 100's of time what CZ sells for, they are typically in expensive settings. CZ on the other hand is so inexpensive that they are typically mounted in very cheap settings.
The early tests, and the least expensive in terms of test equipment, is using electrical conductivity. Moissanite is most likely an insulator like diamond. The more sophisticated tests use ultra violet light. It is even more difficult to test for a synthetic diamond. As such, the synthetic diamond manufactures have agreed to etch their name in the stone.