Refractometer, Integrated LED Light Source Digital Refractometer for Gemstone Identification and Refractive Index Measurement

It can measure the refractive index of gemstones non-destructively, fast and accurately, and can determine other luminous characteristics of gemstones The gem refractometer is the most important tool for determining gems and the most powerful tool for identifying gem species Professional optical design and built-in narrow wavelength quasi monochromatic LED light source make the shadow limit super straight and clear Gem refractometer, using high refractive index lead acid glass as test prism; measurement range: 1.30-1.81, accuracy: ±0.002 Widely Applicable It can be used to measure the salinity of seawater and provide accurate data on the concentration of seawater to lovers of marine life.