Digital Gemstone Refractometer - Jewelry Authenticity Tester, 1.300-3.000 RI Range, 700mAh Battery for 10000 Tests, Error ±0.005, Accuracy 0.001

This Professional Gemstone Identification Refractometer features a precision optical system with a wide measurement range (RI 1.300–3.000), enabling accurate identification of a variety of gemstones including diamonds, sapphires, rubies, emeralds, and more. It is an indispensable tool for gemologists, jewelry designers, and enthusiasts alike.Key Features & Advantages:- Precision Measurement: Offers accuracy up to ±0.005, with a minimum scale value of 0.001, ensuring reliable data for gem identification.- Large LCD Backlit Screen: Provides a clear display even in low-light conditions, easing readability and reducing eye fatigue.- Durable Aluminum Alloy Table: Constructed from hardened material, guaranteeing long-term stability.- Insulation Switch: Made from durable ABS material for enhanced reliability.- Long Battery Life: Equipped with a built-in 700mAh lithium battery, supporting approximately 10,000 measurements, making it ideal for field gemology applications.Technical Specifications:- Measuring Range: Refractive Index 1.300–3.000- Error: ±0.005- Accuracy: 0.001- Battery Type: Lithium Battery (700mAh)- Battery Life: Approximately 10,000 tests- Product Dimensions: 13.5×7.8×2.4 cm- Net Weight: 0.8 kgWhat’s Included:- Gemstone Refractometer × 1- Protective Case × 1- User Manual × 1

• PROFESSIONAL GEMSTONE IDENTIFICATION TOOL - This advanced refractometer features a precision optical system and LED backlight technology, delivering precise refractive index readings from 1.300 to 3.000 with remarkable accuracy of ±0.005 and a resolution of 0.001. Ideal for jewelry professionals and gemology enthusiasts for swiftly identifying diamonds, sapphires, emeralds, and various gemstones.
• WORKING PRINCIPLE - Utilizing the principle of total internal reflection, this gemstone tester measures the refractive index, a fundamental optical property of gemstones. This essential characteristic enables users to accurately identify and distinguish gem varieties based on their unique optical behaviors.
• EASY AND CLEAN TESTING - Unlike conventional methods, this gem identification tool operates without the need for refractive oil. Simply position the gemstone close to the platform for instant measurements, streamlining the process while preserving the integrity of delicate stones.
• CLEAR VISUAL READINGS AND EXTENDED BATTERY LIFE - Equipped with a large LCD display and backlight, along with a high-sensitivity sensor and intelligent electronics, this device guarantees excellent visibility in low-light environments. Powered by a rechargeable 700mAh lithium battery, it can perform up to 10,000 measurements per charge, making it perfect for laboratory settings, field gemology expeditions, and jewelry store use.
• WIDE COMPATIBILITY FOR VARIOUS GEMSTONES - This calibration tool effectively identifies both uniaxial and biaxial crystals, accurately distinguishing between single and double gemstones, including moissanite, diamond, colored gems, natural or synthetic stones, minerals, and other solid materials. An essential tool for gemologists and dedicated collectors.