Built - In LED Gem Refractometer , Hand Refractometer Desktop Polariscope Interference Ball
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Jewelry Handheld Gemological Refractometer Precise Instrument 30*70*130mm2020-05-26 09:53:05 |
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0.4KG Gem Refractometer , Aquamarine Gemstone Convenient Reading2020-05-26 09:53:05 |
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Portable Optical Gem Refractometer , Presidium Gem Tester Primary Tool2020-05-26 09:53:05 |