| Gemological instrument is professionally designed for testing or identifying the gemstone. It is a good instrument to the professional practitioner or the student who are engaged in the gem industry. We have Gemological Refractometer , Spectroscope, Polariscope, Dichroscope, Chealse Filter, Gem Magnifier, Gem Gauge, Gem balance, Ultrasonic Cleaner etc…Specifications:Measuring Range:0-12mm/0-0.5"Resolution:0.01mm/0.0005"Accuracy:±0.02mm/±0.0005"Repeatability:0.01mm/0.0005"Maximum response speed:1500mm/sAlarm:Voltage low, Over speedPower supply: Sliver oxide battery SR44 | 
