High Accuracy Portable Refractometer for Diamonds, Jewelry & Gemstone Testing - Professional Diamond Selector Pen for Ruby, Jadeite, Sapphire & Lab Use

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.

• Experience Professional-Grade Precision with our Digital Mstone Refractometer. Equipped with a High-Precision Optical System, Sensitive Sensor, and Smart Electronics, it delivers Fast and Accurate Refractive Index (RI) Measurements. With a Range of 1.300-3.000, ±0.005 Accuracy, and 0.001 Resolution, it's perfect for Professionals, Mologists, and Enthusiasts seeking Reliable Data.
• **WIDE CALI FOR MSTONES**: Designed for uniaxial and biaxial crystals, this digital mstone tester quickly identifies single and double mstones, including Moissanite, Diamonds, Colored Stones, and more. Ideal for gem appraisal institutions, jewelry factories, collectors, and enthusiasts. Note: Not suitable for semi-hedged products, polished mstones, stones smaller than 2.0mm², or rough stones.
• Discover our innovative Jewelry Refractive Index Tool, designed for optimal accuracy without the need for oil. This easy-to-use device features two calibration blocks (1.487 & 1.806) for precise measurements. Effortlessly identify uniaxial and biaxial crystals based on their refractive index values, ensuring you maintain the integrity of your gemstones. Perfect for jewelers and gemologists alike!
• Discover our Digital Refractometer, designed with a Reliable Working Principle based on Total Internal Reflection. Weighing just 250g, its Compact and Lightweight Design ensures easy Portability. Crafted from Corrosion-Resistant Aluminum Alloy, it enhances Durability while providing Safe and Convenient use. Ideal for various Applications, it delivers accurate measurements to help you distinguish between different substances effortlessly.
• **Discover the Precision of Our Jewelry Authenticity Tester:** Designed with a durable aluminum alloy workbench, this tool ensures stability for accurate measurements. The ABS plastic power switch enhances safety with built-in leak protection. Experience clear readings on the large backlit LCD screen, even in low light. Powered by a rechargeable 700mAh lithium battery, it effectively supports up to 10,000 measurements per charge, making it ideal for labs, field trips, and jewelry stores.