Gemology Equipment With 0.002 Accuracy With Polarizing Lens hand refractometer Model number: FGR-002A Type Testers & Measurements Testing scale 1.35-1...
Portable With Frosted aluminum alloy table gemological refractometer FGR-003A Gem refractometer is the most important professional tool for identifing ...
Index Of RefractionTesting With CZ Prism DC 3V Power Supply Gem Refractometer Model number: FGR-002J Type Testers & Measurements Testing scale 1.35-1....