Specially designed to measure the refractive index of gemstones and solid materials. This instrument provides a key property used for identification and evaluation by analyzing how light bends as it passes through a sample. Refractometers are widely regarded as essential test instruments in gem and material analysis, reflecting their importance in accurate assessment workflows. Primary use is to measure the angle at which light is refracted through a stone, yielding the refractive index that supports stone identification and authenticity checks. compact and portable: small and easy to carry, while delivering accurate results and straightforward operation for efficient measurements in the field or in the lab. Function and performance: designed for precise refractive measurements, with a focus on userfriendly operation and reliable results in realworld conditions. Size and compatibility: compact form factor suitable for pocket or toolkit use; compatible with gemstones and various solid materials requiring refractive analysis. Materials and build: constructed to provide stable measurements with simple handling, suitable for routine testing and quick checks. Use scenarios Gemstone appraisal and authentication: quickly determine refractive index to support stone identification and quality assessment during appraisal or sales consultations. Field sampling and onsite analysis: take the refractometer to mining sites or gem sourcing locations to perform immediate refractive index checks on solid samples. Laboratory material testing and quality control: use in a lab setting to verify refractive properties of solid materials as part of broader material analysis or quality control processes.