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Electronic gem testers, how they work, what they test, and which are the best.
How to distinguish diamond from Moissanite.
How to test for diamond and how to avoid scams; Moissanite, diamond, and synthetic (lab-created) diamonds.
Synthetic-diamond testers are used by professional jewellers and diamond dealers who know that they have a diamond and want to know the chances of it being synthetic or natural. This article explains how they work.
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Just a tiny insight into the world of optics and how to test gemstones using standard (optical) gem testers.
Calibration instructions for Presidium Gem Tester II (PGT II).
Solve 99% of problems concerning diamond testers, Moissanite testers and multi testers.
Chelsea filter instructions
Test loose (not mounted) gemstones using nothing more than a weighing machine, an SG attachment, and water.
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