Gemstone Refractometer with LCD Screens,Jewelry Tester Identification Tools,Refractive Index 1.300-3.000,for Jewelry, Gold,Silver,Diamond

This Professional Gemstone Identification refractometer is equipped with a precision optical system and a wide measurement range (RI 1.300–3.000), allowing accurate identification of various gemstones such as diamonds, sapphires, rubies, emeralds, and more. It is an essential tool for gemologists, jewelry designers, and enthusiasts. Working Principle：Operating on the basis of total internal reflection, the gemstone tester measures one of the most fundamental optical parameters of gemstones—the refractive index. This key characteristic allows users to accurately identify and differentiate gem types based on their unique optical properties. FEATURE: - Precision Measurement: Accuracy up to ±0.005, minimum scale value of 0.001. - Large LCD Backlit Screen. - Durable Aluminum Alloy Table. - Insulation Switch: Made of ABS material. - Built-in 700mAh lithium battery, up to 10,000 measurements. SPECIFICATION: Measuring Range: Refractive Index 1.300–3.000 Error: ±0.005 Accuracy: 0.001 Battery Type: Lithium Battery (700mAh) Battery Life: Approx. 10,000 tests Product Dimensions: 13.5×7.8×2.4 cm Net Weight: 0.8 kg PACKAGE INCLUDE: 1 * Gemstone Refractometer 2 * calibration Block (1*1.487, 1*1.806) 1 * Aluminum Box 1 * Instruction Manual

• Professional Gemstone Identification Tool: The Gemstone Refractometer measures the refractive index of gemstones quickly and accurately without causing damage. Measuring range: refractive index 1.300-3.000, with a precision of 0.001 and an error margin of ±0.005.
• Simple Test Method: This gem identification instrument eliminates the need for refractive oil. Just place the sample near the platform for instant results, simplifying the process while preserving delicate gems.
• Clear Reading & Extended Battery Life: The Jewelry Tester features a large LCD screen for easy reading in low light. With a rechargeable 700mAh lithium battery, it supports up to 10,000 measurements per charge.
• Premium Construction Materials: Crafted from durable aluminum alloy, the gem refractometer is scratch-resistant and stable, ensuring precision testing. It includes an ABS power switch and triple insulation protection to minimize leakage risk.
• Comprehensive Material Compatibility: The Gemstone Identification Tester is suitable for both uniaxial and biaxial crystals, quickly and accurately identifying single and double gemstones, designed for solid materials needing refractive index verification.