130 181Ri Rang Gemstone Refractometer Built In Gem Tester

Refractive Index is one of the most important optical parameters used to identify and authenticate polished precious and semi-precious gemstones. This Gemological refractometer is a low cost, lightweight measuring instrument used by jewellers and traders of gemstones to measure polished stones over a refractive index range of 1.30 to 1.81 RI. The instrument can also be used to identify whether a particular stone is Isotropic or Anistropic (uniaxial or biaxial). Features : 1. Can identify singly en doubly gemstones quickly and accurately. 2. Uniquely designed, low battery consumption and portable. 3. Approved by strict quality and safety standards for long and trouble-free life. 4. Guaranteed high quality and accurate testing results. Description : Type : Gem Refractometer Measuring Range : 1.30-1.81 R Accuracy : 0.002 Main Color : Black Weight : About 330g Size : 11 3 6cm Package Includes : 1 x Gem Refractometer 3 x Button Cell 1 x Oil 1 x English Manual Operating Information : 1. Open Lees meer over de 130 181Ri Rang Gemstone Refractometer Built In Gem Tester van huismerk in de productgroep jewelry and watch