Gemmology Refractometer Gemmology Refractometer CL-181 Compact Lightweight Portable with Refractive Fluid Oil for Jewelry Measuring

Description Refractive Index is one of the most important optical parameters used to identify and authenticate polished precious and semi-precious gemstones. Our item is a low cost, lightweight measuring instrument but with high wccuracy. This Compact Refractometer will be your primary and most powerful tool in gemstone identification. Features refractometer -Color: Black. -Material: Plastic. -Size: 30x70x130 mm/1.18x2.76x5.12 inch. Weight: 400g Measuring Range: 1.30 – 1.81 RI Minimum Graduation Value: 0.01 RI Note: 1. 1 inch=2.54cm/1cm≈0.393inch. 2. Please allow 1-3 cm error due to manual measurement. Pls make sure you do not mind this. Package Including 1 * Refractometer1 * Polarizing Filter1 * Monochromatic Light Filter1 * Mini Flashlight1 * 1ml Refractive Index Fluid Oil1 * 1.5V AAA Battery1 * Storage Box1 * Refractometer Index Reference List(for 77 common gemstones, i.e. Calcite, Jadeite, Quartz etc.)1 * Quick Start Guide

• Our Jewelry Refractometer ismade of plastic material which is for long term use and it can provide a longer service life and a lower replacement frequency
• This Compact Refractometer will be your primary and most powerful tool in gemstone identification
• The Gemmology Refractometer has been uniquely designed for a low battery consumption and easty to carry with to anywhere you like
• With this Refractometer, you can identify singly & doubly gemstones quickly and accurately
• The Portable Refractometer is a low cost, lightweight measuring instrument but with high wccuracy