COAKUE Gemstone Refractometer, Jewelry Tester Identification Tools

COAKUE

【PREMIUM DURABLE & SAFE BUILD】This portable gem refractometer weighs only 250g for easy carrying and outdoor use. Adopting high-strength aluminum alloy shell for scratch resistance and long service life, it features an ABS insulated switch and built-in triple insulation protection for safe function. Equipped with an LCD backlit display, it delivers clear, bright readings even in low-light environments. 【HIGH PRECISION PROFESSIONAL DETECTION】This professional digital refractometer for gemstones is built with a high-sensitivity precision sensor and advanced optical system based on the total internal reflection principle. It covers a 1.300-3.000 measuring range, features 0.001 resolution and ±0.005 measurement error, and delivers accurate quantitative refractive index data to support scientific and rigorous gem identification results. 【OIL-FREE NON-DESTRUCTIVE TESTING】Different from traditional refractometers requiring refractive oil, this upgraded tester only needs users to attach the gem sample to the measuring platform for instant detection. It effectively protects the integrity of delicate gems while simplifying the testing workflow, greatly improving daily appraisal efficiency. 【LONG LASTING RECHARGEABLE BATTERY】Powered by a built-in 700mAh rechargeable lithium battery, this practicalRefractometer Jewelry supports up to 10,000 times of measurements per full charge. Its excellent battery endurance meets the long-term continuous use demands of jewelry stores, field gem detection and laboratory testing scenarios. 【WIDE COMPATIBILITY & VERSATILE APPLICATION】As professional jewelry tester identification tools, this device identifies uniaxial and biaxial crystal gemstones with high accuracy. It works perfectly for diamonds, moissanite, colored gems, natural/synthetic stones and mineral solid materials, ideal for jewelry appraisal institutions, processing factories and gemstone collectors.