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Electronic gem testers, how they work, what they test, and which are the best.
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How to distinguish diamond from Moissanite.
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How to test for diamond and how to avoid scams; Moissanite and diamond; recommendations.
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Just a tiny insight into the world of optics and how to test gemstones using standard (optical) gem testers.
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Calibration instructions for Presidium Gem Tester II (PGT II).
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Diamond Selector II by Culti, and copies made in China - how to tell the difference.
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Solve 99% of problems concerning diamond testers, Moissanite testers and multi testers.
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Chelsea filter instructions
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SYNTHETIC DIAMOND SCREENER (SDSII) by Presdium
SYNTHETIC
DIAMOND + MOISSANITE TESTER (Veritas) by Gemtrue
SDSII
by Presidiu...
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Test loose (not mounted) gemstones using nothing more than a weighing machine, an SG attachment, and water.
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