Presidium Gem Tester II (PGT II) - Testing Emerald, Diamond

Presidium Instruments

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Presidium Gem Tester/Colored Stone Estimator II, PGT II

Gemstone Testing Machine Black Presidium Gem Tester Pgt-2, For

Presidium Gem Tester II (PGT II) - Testing Ruby, Diamond, Sapphire

GIA iD100® Gem Testing Device

Presidium® Gem Tester II – ZAK JEWELRY TOOLS

Presidium Gem Tester II (PGT II) - Assisted Thermal Calibration

Presidium Multi Tester III and Synthetic Diamond Screener II

New Gemstone Tester, Gemlogis Mantis & BLEU Gemstone Meter

The Presidium Gem Indicator handheld tester in the industry

Colored Gemstones Tester Accurate Result Presidium Gem Indicator