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Are you looking to accurately identify genuine gemstones and avoid costly imitations? Our professional Gemstone Refractometer is designed for gem enthusiasts, collectors, and professionals who demand precision and convenience. This essential tool offers lab-grade accuracy in a portable format, making gemstone verification easier than ever. ✦✦ Key Features ✔ Effortless Operation: Our innovative refractometer eliminates the need for messy oils. Simply place your gemstone on the platform for quick, non-destructive measurements. ✔ High Precision: With a wide refractive index range from 1.300 to 3.000 and an accuracy of ±0.001, this digital refractometer ensures reliable results every time. ✔ Durable & Portable: Constructed from high-strength aluminum alloy, this lightweight device (only 250g) is scratch-resistant and easy to carry, ideal for on-the-go professionals. ✔ Long Battery Life: Featuring a 700mAh rechargeable battery, this gem identification tool can perform thousands of measurements on a single charge. ✦✦ Versatile Applications ✔ Jade & Nephrite: Quickly verify authenticity by checking refractive indices such as 1.66 for jadeite and 1.61 for nephrite. ✔ Diamonds & Simulants: Effortlessly differentiate between mined diamonds (RI 2.417) and popular imitations like cubic zirconia. ✔ Colored Gemstones: Confidently identify single and double crystal gemstones, as well as other polished materials. ✦✦ Technical Specifications - Product Name: Gemstone Refractometer - Measurement Range: RI 1.300 - 3.000 - Accuracy: ±0.001 - Measurement Error: ±0.005 - Battery: 700mAh Rechargeable - Dimensions: 135 x 78 x 24 mm - Weight: 250g ✦✦ Package Includes - Gemstone Refractometer x 1 - Calibration Blocks (1.487 & 1.806) x 2 - Aluminum Storage Box x 1 - Tweezers x 1 - User Manual x 1 ✦✦ Important Note: For best results, calibrate with the provided blocks prior to use. Discover the true value of your gemstones with confide... Discover the Gem Refractometer, a Professional Tool for Jewelers featuring a clear LCD Display. This essential instrument allows for accurate gemstone analysis, helping you identify and evaluate precious stones with ease. Compact and user-friendly, it’s perfect for both beginners and experienced professionals in the Jewelry industry. Enhance your gemology skills today! Discover the convenience of our Gem Refractometer, designed for effortless gem identification. No refractive oil needed; just place your sample on the platform. Ensure accurate results with included calibration blocks (1.487 & 1.806). Perfect for jewelers, gemologists, and enthusiasts seeking reliable and precise measurements every time. 【High-Precision Measurements】Experience accurate readings with this Digital Gemstone Refractometer. Designed for jewelers, it features a refractive index range from 1.300 to 3.000 and an impressive accuracy of 0.001. Ideal for non-destructive analysis, this tool provides the essential data for evaluating diamonds and colored gemstones with ease and precision. 【Professional Gem Identification】This Professional Gem Refractometer is an essential Jewelry Identification Tool. Utilizing internal reflection, it features a high-precision sensor to measure a gemstone's Refractive Index. This ensures reliable data for accurate Gemstone Identification, helping to distinguish between various types of Gems effectively. Perfect for jewelers and gem enthusiasts alike. Discover the Durable Gem Refractometer, crafted from High-Strength Aluminum Alloy for lasting performance. Weighing just 250g, its Portable Design makes it easy to carry. Enjoy precise readings on a Clear LCD Backlit Display, while the Insulated ABS Switches ensure safe and comfortable use. Perfect for Gemology, Jewelry Making, and more! Item Weight 2.2 pounds Manufacturer Generic Item model number Generic Batteries required No Package Dimensions 3.15 x 3.15 x 3.15 inches