The probe tip must be placed at a right angle or
perpendicular to the facet of the gemstone for an
accurate reading.
Tests should be conducted on the table of the gemstone.
In the event of any doubt, you may also test on the girdle
of the gemstone.
For proper operation of the tester, ¿ngers must be placed
on the metal grip at all times.
To achieve optimum test accuracy involving very small
mounted gemstones (1.22mm exposed diameter and
below), it is extremely important that no contact is made
on any metal/jewelry setting part of the jewelry.
To achieve optimum test accuracy involving very small
gemstones (10 points and below), it is important to allow
the gemstone to cool down for 5-10 seconds in between
tests.
It is advisable to conduct multiple tests on different points
on the gemstone as thermal conductivities may differ
slightly along different crystal axes of the gemstone.
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