CelyToe Gemstone Refractive Index Meter, Digital Jewelry Refractometer with LCD Backlit Display, 1.300-3.000 Measuring Range for Jewelry Appraisal & Identification
CelyToe
【Wide RI Measuring Range】The gem refractometer covers refractive index from 1.300 to 3.000, compatible with diamonds, moissanite, colored gems, glass ornaments and various mineral samples for jewelry identification. 【Oil-Free & Non-Destructive Test】No refractive liquid required. Simply place gemstone on the test platform and tap the TEST button to get instant digital readings, no damage to polished stones. 【Large Digital LCD Display】Clear screen directly shows refractive index data, intuitive reading without manual scale calculation, suitable for long-time jewelry appraisal work. 【Compact Desktop Portable Body】Smooth white anti-scratch housing, small footprint for countertop, lab and jewelry shop use. Essential optical tool for jewelers, gem students and jewelry inspection studios. 【Working Principle】The working principle of the refractometer is based on total internal reflection. The refractive index is a very important optical parameter,this key characteristic allows users to accurately identify and differentiate gem types based on their unique optical properties.
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