Professional Diamond Tester for All Gemstones - High Accuracy Refractometer with 0.001 Precision, Ideal for Jewelry Experts & Novices, Measures Refractive Index 1.300-3.000

This gemstone refractometer is a precision tool designed for the identification of polished gemstones, featuring a large LCD backlight for clear readings. It measures refractive indices from 1.300 to 3.000 with an accuracy of 0.001 and an error margin of ±0.005. Ideal for testing various gemstones, including jade and Hetian jade, it helps determine if their refractive indices match expected values (1.66 for jade and 1.61 for Hetian jade). It also distinguishes between natural and artificial diamonds, with natural diamonds having a refractive index of 2.417. ▶Specifications:Measuring range: refractive index 1.300-3.000Measurement error: + -0.005Measurement accuracy: 0.001Battery life:10.000 TimesPower supply: 700mA Lithium BatteryProduct Size: 13.5x7.8x2.4cm(5.31x3.1x0.94inch)Net weight: 0.8kg(1.76lbs)▶Products include:1*Professional Digital Gemstone Refractometer2*calibration block (1*1.487, 1*1.806)1*aluminum box1*instruction manual▶Note: Slight color variations may occur due to lighting, and a 1-3cm measurement error is possible due to manual handling.

• **Professional-Grade Precision Measurement**: This Digital Mstone Refractometer features a high-precision optical system, sensitive sensor, and smart electronics for fast and accurate refractive index (RI) measurements. With a range of 1.300-3.000, ±0.005 accuracy, and 0.001 resolution, it meets the needs of professionals, gemologists, and enthusiasts, providing reliable quantitative data.
• Discover the Wide Cali for Mstones, designed for uniaxial and biaxial crystals. This digital m er accurately identifies single and double mstones, including Moissanite, Diamonds, and Colored Stones. Ideal for appraisers, factories, collectors, and enthusiasts. Note: Not suitable for semi-hed products, polished mstones, or stones smaller than 2.0mm². Enhance your gem identification experience today!
• Discover our innovative Oil-Free Gemstone Refractometer, designed for easy use without traditional oils. Simply position the gemstone close to the platform for immediate results, ensuring the integrity of your measurements. This jewelry refracting tool includes two calibration blocks (1.487 & 1.806) for precise measurement accuracy, allowing you to differentiate between uniaxial and biaxial crystals effortlessly.
• Introducing our Digital Refractometer, designed for precise Refractive Index measurements based on total internal reflection principles. Weighing just 250g, its lightweight and portable design ensures easy handling. The corrosion-resistant aluminum alloy shell enhances durability, making it ideal for various applications. Experience reliability and convenience in your measurements with this essential tool.
• Discover our Jewelry Authenticity Tester, designed for reliable performance and durability. This device features a scratch-resistant aluminum alloy workbench for stable precision. The ABS engineering plastic power switch and built-in triple flat protect against leaks. With a large LCD backlit screen for easy reading in low light, it supports up to 10,000 measurements per charge, making it ideal for labs, field trips, and jewelry stores.