Digital Refractometer for Jewelry, with LCD Display, Refractive Index 1.300-3.000, Ideal for Diamonds, Jade and Crystals

This Professional Gemstone Identification refractometer is equipped with a precision optical system and a wide measurement range (RI 1.300–3.000), allowing accurate identification of various gemstones such as diamonds, sapphires, rubies, emeralds, and more. It is an essential tool for gemologists, jewelry designers, and enthusiasts.Technical Specifications:Dimensions: 135.0 x 78.0 x 24.0 mm (5.31" x 3.07" x 0.94")Weight: 250g (0.55 lbs)Measurement Range: Refractive Index 1.300 ~ 3.000Accuracy: ±0.001Measurement Error: ±0.005Battery Capacity: 700mAh Lithium BatteryProduct List:Gemstone Refractometer × 1Protective Case × 1Note:1. Due to the difference in light and screen settings, the color of this item may be slightly different from the pictures.2. Please allow slight size differences due to different manual measurements.

• 【Professional Gemstone Identification Tool】 Equipped with precision optical system and LED backlight technology, this refractometer provides accurate refractive index measurements ranging from 1.300 to 3.000, with an exceptional accuracy of ±0.005 and resolution of 0.001. suitable for jewelry professionals and gemology enthusiasts to quickly identify diamonds, sapphires, emeralds, and other gemstones.
• 【Gem Refractometer】 Refractive index, as an important optical characteristic parameter of gemstones, is an important basis for distinguishing gemstone types and judging their physical properties. Our gemstone refractometer has a built-in high-precision sensor and performs measurements based on the principle of total internal reflection. By accurately capturing this parameter, we can provide scientific and reliable theoretical support for gem identification.
• 【Easy And Clean Testing】Unlike traditional methods, this gem Identification Instrument requires no refractive oil. Simply place the sample’s measurement close to the platform for instant results. The process not only simplifies working but also maintains the integrity of delicate gems.
• 【Clear Visual Reading & Extended Battery Life】Featuring a large LCD screen with backlight illumination, a high-sensitivity sensor, and intelligent electronics, the device ensures excellent readability even in low-light conditions. Powered by a rechargeable 700mAh lithium battery, it supports up to 10,000 measurements per charge, making it suitable for lab use, field gemology trips, and jewelry store applications.
• 【Wide Application】Designed for measuring the refractive index of gemstones and various solid materials, it can quickly and accurately identify single crystal gemstones, twin crystal gemstones, diamonds and various colored gemstones. It is widely used in jewelry appraisal institutions, gem processing factories, collectors and other scenarios. Note: Semi-finished products, poorly polished gemstones, gemstones less than 2.0mm² and rough stones cannot be measured.