Portable With Monochromatic Light Filter Gemological Testing Instrument FGR-003A Model number: FGR-003A Type Testers & Measurements Testing scale 1.35...
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... of a , which often gives vital clues to the identity of a . Fable brand provides a numerical reading from a scale yo...
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Built-in LED Gemstone table Polariscope with Interference ball Desktop Polariscope Model RHGZ-110/220 Product description It is very useful in identif...
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