Jemeter Digital 90 Gemstone Gem Measuring Instrument
This Jemeter Digital 90 is an instrument for measuring the refractive index of faceted gemstones. It can cover a full range from 1.450 to 2.999. It is simple to operate, and does not require removing gem from their settings, as long as a faceted portion is placed face down. * This Jemeter is in excellent and working condition, and includes a battery, two cups, reference card and instructions. * For the gemologist or gem collector, the Jemeter Digital 90 is useful tool for testing your stones.