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Accessories Included: Gem cup and 20g calibration test weight
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Ultrasonic vibration itself can damage these materials
Handbook of Gemmology - 5th Edition - 3 volume Set brushes for hangmotor ⚠️ Safe Usage NoteUnlock the fascinating world of gemstones with this definitive 3 volume seriesperfect for gem enthusiasts, professionals, and collectors alike! Volume One: The Science of GemmologyExplore the fundamentals of gemstones, from their chemical composition to optical and physical properties. Learn about crystallography, light absorption, spectroscopy, polariscope techniques, and advanced tools used to examine and authenticate gems. Plus, uncover the secrets