Gemstone Testers

I can't find the probe cap for my Presidium PGT/PDT Tester
It is possible that the probe cap has gotten stuck on the bottom of the pocket where it was initially stored.  Try feeling around the bottom to see if thi...
Wed, 3 Sep, 2014 at 1:13 PM
Where is the simulant kit for the Presidium PDT Tester?
If you look at the bottom of the tester, you should see a slot. If you push that slot through the side,  the simulant kit will come out.
Wed, 3 Sep, 2014 at 1:20 PM
Can a gem tester recognize artificial (man made, lab created) stones?
Unfortunately there is no electronic gemstone tester that can distinguish between artificial (man made, lab created)  and natural gemstones, as they both ...
Wed, 3 Sep, 2014 at 1:22 PM
How are Presidium PDT Testers advantageous?
The Presidium Duo tester is both a thermal conductivity tester and reflectivity meter in one. The reflectivity tester  allows for further, more accurate i...
Wed, 3 Sep, 2014 at 1:22 PM
What's the difference between the Presidium PDT & PDT-S7?
The Presidium PDT tester includes 7, 0.5 ct diamond size equivalents of these simulants: Strontium Titanate,  Cubic Zirconia, GGG, High Zircon, YAG, Synth...
Wed, 3 Sep, 2014 at 1:23 PM
Will the Presidium Gem Tester (PGT) detect moissanite?
The Gem Tester will not detect moissanite. It works on the same principal as a diamond tester: using a thermal  conductivity test. To test for moissanite,...
Wed, 3 Sep, 2014 at 1:23 PM
Can the Presidium PGT Tester test 1mm/1pt diamonds?
Due to the nature of the testing performed by the Presidium PGT Diamond & Gemstone Tester, it is unlikely that  you will obtain accurate results for 1...
Wed, 3 Sep, 2014 at 1:24 PM