The Refractometer Gem Refractometer with Refraction Oil is a portable instrument designed to measure the refractive index of gemstones and jewelry to aid identification and authentication. It provides a practical, non destructive way to distinguish natural stones from imitations, with focused utility for jade and other gems. Key benefits Quick, non destructive gemstone identification based on refractive index readings. Compact, handheld design that fits in a , showroom, or field setting. Simple operation that requires minimal training, helping staff and students work efficiently. Supports quality control and customer confidence by helping differentiate stones from look alikes. Key attributes Functionality: gem refractometer for refractive index measurement used for jewelry identification and jade stone recognition. Compatibility: suitable for identifying jade and other gemstones commonly encountered in jewelry. Size and form: compact handheld instrument designed for easy transport and use in various settings. Included items: refraction oil supplied with the instrument for immediate use. Performance: provides refractive index readings that support material identification when used with the included oil. What makes it useful The instrument provides a straightforward way to identify stones by refractive index, helping to verify authenticity and classify gemstones without destructive testing. Its portable design supports on site verification during sales, appraisals, or jewelry inspections, as well as hands on learning for gemology students. Use cases On site authentication in a jewelry store: quickly verify jade and other gemstones during customer consultations or quick appraisals. Gem identification during or : determine stone type to support accurate pricing and disclosure. Educational practice: students and hobbyists can practice interpreting refractive index readings and learn gemstone identification procedures.