The Presidium Reflectivity Meter accurately measures the quality and quantity of light reflected through the stone giving you an instant reading of its Reflective Index. The Presidium Reflectivity Meter can help identify the nature of every uncoated stone. Included is a Reflectivity Chart Listing for the most common stones:
Y.A.G., High Zircon
Operates on a 9-volt battery or directly from a wall plug. (Battery and AC adaptor are optional)
Simply place your loose stone on the testing light hole, cover the stone with the built in plastic cover, and press the test button to see your results.
Helps Identify Colored Stones and Diamond vs Diamond Simulants