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Aluminum Alloy Gemological Refractometer Gemstone Testing Instrument FGR-003

Ningbo Vanco Instrument Co.,Ltd

Aluminum Alloy Gemological Refractometer Gemstone Testing Instrument FGR-003

Aluminum Alloy Gemological Refractometer Gemstone Testing Instrument FGR-003

FGR-003 Gemological Refractometer The refractometer is considered by some to be the most important of all gem identification instruments. It can be indicated (not measures) the refraction index of a ...

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dichroscope for gem testing

      

portable polariscope

      
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