This kit of tests can distinguish genuine diamonds and Moissanite from imitations with a high degree of accuracy. The Diamond selector II and the Moissanite tester are two separate tools used to identify diamonds and Moissanite, respectively.
The "Diamond Selector II" is a lightweight electronic tool for identifying genuine diamonds and Moissanite, as well as other imitation stones, in a short amount of time and without risk.

Features:

LED and sound-based feedback on results.
A solid and trustworthy reading
Warn about metal!
Calibration of stones of varying sizes is a breeze.
Easy-to-carry pouch
Laboratory for the Analysis of Loose Stones

Specifications:

Dimensions: " 6.5" x 1.5" x 0.75" (Depth)
Weight: 5 oz
Testing Capability: Diamonds, Moissanite
Color: Silver
Auto Off: N/A
Initial warm-up: ~ 20 sec
Indicator: Audio and LED lamps
 
Moissanite Tester can be used to further distinguish real diamonds from moissanite.