The Presidium Gem Tester II is the industries most reliable colored ge
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Gem Tester II: Quick Diamond/Moissanite Identification & Colored Gemstone Separation
Presidium Gem Tester PGT II Colored Gemstone Testers Estimator Display Gemological Testing Identification Instrument Tools
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Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones : Presidium: Arts, Crafts & Sewing
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Presidium Instruments - The only handheld digital tester in the industry specifically for colored gemstones, and tests for 31 types of gemstones. The Presidium Gem Indicator, the only handheld tester in the
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Presidium® Gem Tester II Colored Stones Diamond Testing Machine – SEP Tools
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Gem Tester II (PGT II) Test Types of Natural Gemstones