This digital instrument will read both the refractive and reflective indices of well-polished and faceted gemstones without the use of RI Liquid. It has a range of 1.3 to 2.99, so it goes beyond traditional refractometers using RI Liquids (maximum 1.81).

• No Refractometer Oil Needed
• Read Results on LCD
• Easy and Simple to Use
• High Accuracy