Gemstone Refractometer – Professional Digital Gem Tester for Jewelry, Gemstone, Ruby, Jadeite, Sapphire, Diamond, and Lab Use, Refractive Index 1.300-3.000

●Can you accurately tell real diamonds from fakes in seconds without damaging them?●This GESAIDES refractometer is your trusted companion for instant, reliable gem identification.●Advantages1. Skip the messy refractive oils! Simply place your gem or solid sample onto the measurement platform for a fast, clean, and contactless reading.2. Features a high-precision sensor delivering measurements from 1.300 to 3.000 with an impressive accuracy of ±0.001 and error margin of only ±0.005.3. Crafted from lightweight yet rugged high-strength aluminum alloy (only 250g / 0.55 lbs), it withstands scratches, corrosion, and fieldwork. The bright backlit LCD display ensures clear readings anywhere.4. Long-Lasting & Efficient: Powered by a 700mAh battery providing approximately 200 measurements per charge.5. Complete Package for Success: Everything you need is included: Refractometer, Aluminum Box, Tweezers, Countertop cover, Calibration Blocks (1.487 & 1.806), and English Manual.●SpecificationsSize: 135 x 78 x 24 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 BatteryApprox. Measurements per Charge: ~200●NotesFor optimal accuracy, always calibrate the device using the included calibration blocks (1.487 & 1.806) before each use session.●After-Sales ServiceAdhering to the “customer first, quality first” concept, is committed to providing you with a full range of efficient and caring after-sales service, to ensure that you use in the process of worry-free.

• 【Refractometer Identifies Gems】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, can provide scientific and reliable theoretical support for gem identification.
• 【Measures Gem Refractive Index】As a core tool in the field of jewelry identification, it can measure the refractive index of gemstones non-destructively, quickly and with high precision. Its built-in high-precision sensor covers a measurement range of 1.300-3.000, meeting the identification needs of most common gemstones and providing quantitative data to support identification results. The measurement error is as low as ±0.005.
• 【Calibrated Oil-Free Gem Tester】No need to use refractive oil, just bring the sample close to the measuring platform to measure. Based on this parameter, you can tell whether the gemstone is uniaxial or biaxial. In addition, it is equipped with two calibration blocks of 1.487 and 1.806, which need to be calibrated before measurement to ensure the accuracy of the measurement results.
• 【Compact Tough Refractometer】The portable design makes the jewelry refractometer compact and lightweight, weighing only 250 g. And it adopts high-strength aluminum alloy shell, which is scratch-resistant, corrosion-resistant and has a long service life. In addition, it is equipped with an LCD backlit display and ABS insulated switches, with built-in triple insulation protection, ensuring clear and bright viewing comfort while ensuring safe use.
• 【Uses Refractive Index to Identify Gemstones】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.