Refractometer Discounts apply BASIC OPERATION: Rest the flat

BASIC OPERATION: Rest the flat polished surface of the stone on the test plate

Field of view: nearly 2 newspaper columns X 15 lines of text

Measures from 1 point to 4 carats

This is the one stone that looks like diamond

The Apex tests for the following:

Refractometer Discounts apply BASIC OPERATION: Rest the flatSummary For the gemmologist the refractometer is the most important gem tester after a loupe. It measures refractive index (to what extent light is bent as it passes through the gemstone). This product is intended for gemmologists (or those about to study gemmology) instructions are not included. Guarantee: 1 year. Detail Approx. 5 X 3 X 2 inches Built in monochromatic LED light Range: 1. 30 to 1. 81 Possible error in readings: + 0. 01 Test plate made