Presidium Gem Tester PGT II Colored Gemstone Diamond Distinguish Estimator Display Gemological Identification Instrument Tools

Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration

Presidium Gem Tester PGT II Colored Gemstone Diamond Distinguish Estimator Display Gemological Identification Instrument Tools

Presidium Gem Tester II (PGT II)

Gem-n-Eye Digital Refractometer

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Presidium Gem Tester PGT II Colored Gemstone Diamond Distinguish Estimator Display Gemological Identification Instrument Tools

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Presidium Electronic Gem Gemstone Diamond Tester PGT by Presidium

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