Of the issues experienced with these testers, the below are the most common. If you have a problem with your 

tester that isn't resolved by following the steps listed, please contact us so that we can help you out.

There is no power to the tester

  1. Remove battery tab
  2. Fully charge the batteries
  3. Plug into AC Adapter



Diamonds are testing as moissanite

  1. Clean the stone being tested, preferably via steam or ultrasonic cleaner
  2. Make sure the stone is dry
  3. Clean the tester tip by rubbing it against non-waxed, white paper
  4. Allow time for the stone to cool between tests
  5. Hold the tester tip flat on the crown of the stone
  6. Make sure that the tester tip isn't touching metal and stone at the same time



Irregular reading while testing

  1. Clean the stone being tested, preferably via steam or ultrasonic cleaner
  2. Make sure you are holding the tester properly (touching both of the metal strips on either side of the tester)
  3. Allow time for the stone to cool between tests
  4. Clean the tester tip by rubbing it against non-waxed, white paper
  5. Hold the tester tip flat on the crown of the stone (tester is at about 90 degrees to the surface of the stone)
  6. Be sure to apply enough pressure to the tester, so that the tester's tip is fully retracted while testing (please do not apply excessive pressure though, as this can damage the tip)