This refractive index meter is perfect for separating gemstones, diamonds, moissanite, and other simulants quickly and easily.  The machine works by measuring the quantity of light reflected through the stone.  Unlike a traditional refractometer that has a limited range of measurements, t his machine can measure a wider range of R.I. value from 1.000 to about 3.000.  Plus, this machine can test stones without using R.I. liquid that’s used in traditional refractometers.  No wait time between tests makes testing large quantities of stones much easier.  The unit comes with software that provides a database of more than 50 gemstones with their properties and origins, for better readings.  Order this Refractive Index meter today at Stuller.com/tools.