Portable Jewelry Refractometer - Gemstone Tester, Refractive Index 1.30-1.81, Accuracy 0.01, Ideal for Testing All Gemstones, Lab Quality

The Jewelry Refractometer is a digital gemstone refractometer designed for testing all types of stones with a high level of accuracy. It measures the refractive index from 1.30 to 1.80 with a precision of 0.01, allowing you to assess gemstones non-destructively. Its compact and lightweight design makes it easily portable and user-friendly, making it an essential tool for anyone in the jewelry industry.Key Features:- High accuracy in determining whether a gemstone is a uniaxial or biaxial crystal, as well as its phototropic properties.- The refractometer has a measuring range of refractive index from 1.30 to 1.80, providing dependable evaluations for gemstone authenticity.- The eyepiece measures 1.6cm in diameter, and it has a tabletop made from low dispersion, high hardness glass for enhanced durability.- Equipped with a flashlight for better visibility (note that the flashlight requires 1 AA battery, not included).- Product dimensions are 11x3.4x6cm and it weighs 400g.Included in the package:- Gemstone Refractometer x1- Flashlight x1- Refraction Oil x1- English Manual x1

• Working Principle: The gemstone tester operates by measuring the refractive index of gemstones, a critical optical parameter that helps determine their characteristics.
• Core Advantages: This jewelry refractometer offers high precision, allowing users to discern whether a gemstone is a uniaxial or biaxial crystal, as well as its phototropic behavior. The lab-grade refractometer is designed to resist scratches and corrosion, ensuring a long lifespan.
• Precise Measurement: The digital gemstone refractometer accurately measures the refractive index for all stones within the range of 1.30 to 1.80, with a measurement accuracy of 0.01, making it an essential tool for gem enthusiasts.
• Compact and Lightweight: The digital gem and glass refractometer is designed to be compact and lightweight, featuring a built-in flashlight powered by a standard AA battery (not included), ensuring durability and convenience for testing various gemstones and jewelry.
• What You Get: The complete package includes a gemstone refractometer, flashlight, refraction oil, and an English manual, providing everything you need for easy operation and effective gemstone testing.