1. Refractometer for jewellery identification: The measuring range is 1.30 1.80. It provides crucial gemstone identification as refractive indices vary between gemstones. The refractometer is also one of the few instruments capable of analyzing both opaque and transparent gemstones. 2. ACCURATE AND FAST: It aids in identifying diamonds, moissanite, and colored gemstones, speeding up the verification process for packaged gemstones while delivering consistent and reliable results. The display is clear, and readings are easy to interpret. 3. Principle: Enables quick and precise identification of single and double refractive gemstones. Utilizing the refractive index principle, this tool accurately distinguishes different gemstone types based on their unique refractive indices. 4. Easy and Durable: Equipped with a builtin light source, it can be used in various environments. Lightweight and compact for easy portability. Features low battery consumption and a long lifespan.