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Presidium DuoTester- PDT- S7
The Presidium DuoTester is the only
tool on the market that provides the user with two proven
tests for diamonds and the ability to differentiate
between similarly colored gemstones. There are built in
diamond and simulant test discs for easy calibration of
the thermal tester.
An AC adapter is supplied, or you have the option of using five
AA batteries (not included)