Gain Express Gem Gemological Gemelogy Refractometer with Built-in LED Light + RI Oil + 1.30-1.81 RI Range + 0.01 nD Scale Division

Gemstone Refractometer with built-in Light Source that makes it a carry-and-use-it-anywhere device. Comes with Automatic Temperature Compensation (ATC) that let itself adjust to the climate. With the aid of contact liquid (RI Fluid), that will create an optical contact between the glass and the gemstone, you can measure or test the Refractive Index of faceted stones, transparency or opacity, and its beauty, durability and scarcity. Features: HEAVY-DUTY and Built to last Provides three (3) 1.5V button type batteries Convenient & easy to carry With built-in Light Source that makes it a carry-and-use-it-anywhere device Comes with Automatic Temperature Compensation (ATC) that let itself adjust to the climate A bottle of Refractive Index Fluid is provided Approved by strict quality and safety standards Undoubtedly durable, very reliable and assures accurate testing results Specification: Measuring Range : 1.30 - 1.81 RI Minimum Graduation : (RI) 0.01 RI Illumination : Internal Light Source with momentary/power switch Dimension : 35mm x 63mm x 115mm Scale Division : 0.01 nD Weight : 0.4 kg Ranges of Application : Laboratory, Gemology Filter : Polarizing filter Power Source : 3 x AG13 1.5V button batteries Color : Black Set includes: 1 x Gem Refractometer 1 x FREE bottle of 1.800 Refractive Index Oil 3 x FREE 1.55V AG13 Batteries 1 x FREE Refractometer Index Reference List (For 77 common gemstones, i.e. Calcite, Jadeite, Quartz etc.) Polarizing Filter English User's Manual Standard Factory Packaging

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