Since moissanite and diamond have similar thermal conductivity properties, most traditional electronic 

diamond testers cannot distinguish between the two. A moissanite tester should be used if at any time 

you believe that a stone that has already tested positive for diamond may actually be a simulant. 

Moissanite testers use electrical conductivity testing, which allows them to distinguish between diamond 

and moissanite with ease.

Both integrated diamond moissanite testers and seperate diamond and moissanite testers will do the job 

of seperating diamond from moissanite. Keep in mind that moissanite testers will not detect any other 

simulant, and should only be used after a traditional diamond test has been performed.