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Calibrate with Water (water = 0% Urea Concentration) and wipe clean with a cotton towel
wiping cloth
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such as sodium chloride
Gemvue Gemstone GEM Refractometer - Gemology Gemologist GIA Antifreeze Refractometer Calibrate with Water (water =GEMVUE PORTABLE REFRACTOMETER WITH EXTERNAL LIGHT SOURCE AND RI FLUID. THE REFRACTOMETER IS A MUST HAVE IDENTIFICATION TOOL FOR ANY GEMSTONE ENTHUSIAST. BOTTLE OF FLUID IS 2ML. GEMVUE PORTABLE REFRACTOMETER WITH EXTERNAL LIGHT SOURCE AND RI FLUID. THE REFRACTOMETER IS A MUST HAVE IDENTIFICATION TOOL FOR ANY GEMSTONE ENTHUSIAST. THIS MODEL COMES COMPLETE WITH A SLIM INCANDESCENT FLASH LIGHT, 2 OZ BOTTLE OF RI FLUID, AND ALUMINUM CARRYING CASE. THE
US$ 24.95
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US$ 65.00
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