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The test results are indicated as follows:
• After pressing the probe tip on the stone for about 2
seconds, the indicator will reach its highest position,
then slowly fall back. Take the reading at the highest
position.
• The tester will provide all possible results on the
display.
• The Presidium Gem Tester II should be used only to
conrm the identity of suspected gemstone.
• An example of reading the result on the meter is given
below:
3. READING TEST RESULTS on your Presidium
Gem Tester II
When the indicator stops at the above position, the stone
tested may be Quartz, Amethyst, Citrine, Tanzanite or
Aqua, i.e., any stones that fall within the black strip that
the indicator passes.
Metal Alert Buzzer: If the tip of the pen comes in contact
with the metal mounting of a stone, an audible signal is
emitted.
• LIGHT GREY band: Simulant is detected if the needle
falls into this band
• DARK GREY band: Diamond/Moissanite is detected if
the needle falls into this band.
Relatively low readings in the dark grey zone must be
expected with very small diamonds.
Based on the thermal test results, Presidium Gem Tester
II can easily distinguish between:
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