Diamond tester

Hi all,

Can anyone recommend a decent handheld diamond tester? I mainly need
it to make sure stones are diamond, not cz, moissanite, white
sapphire, glass, etc. before taking a torch to it while doing repair

Thanks and Happy 2014 Alexis

Stuller carries two. I would think would be of help. Azure, and the

Andy “The Tool Guy” Kroungold