Step 1 - Slide open the battery cover and insert three AAA batteries battery., Step 2 - Slide the power switch to the Diamond setting and wait for the power bulb to turn red and the ready bulb to blink green., Step 4 - Hold the tester with your index finger touching the electricity-conducting panel on top of the tester., Step 3 - Clean the tester and the probe thoroughly and remove the protective cap from the probe tip., Step 5 - Press the probe tip at a right angle onto the top of the stone., Step 6 - The tester will use thermal connections to give a result.,

Using a Prestium Diamond Tester 3

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