Gem-A Thermal Diamond Tester - Gem-A Instruments

Presidium Gem Tester/Colored Stone Estimator II, PGT II

Gem-A Thermal Diamond Tester - Gem-A Instruments

Benchmark, Efficient presidium gem tester for Jewellers

GTE Gold Silver Diamond Tester Selector Gemstone Jewelers Testing Kit – GOLD TESTING EQUIPMENT

Presidium Instruments Gem Tester II (PGT II) with Poland

High Accuracy Diamond Tester Selector Gemstone Jewelry Gems Tool with Protected Leather Bag (Battery Not Included), Adult Unisex, Size: 16 * 4 * 2.2cm

Presidium Instruments

Gem Tester II: Quick Diamond/Moissanite Identification & Colored Gemstone Separation

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Professional Diamond Selector II, Gem Tester Pen Portable Electronic Diamond NEW