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

★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.①JadeGem refractometer is suitable for identifying polished finished products.Jade jade can be tested to determine whether the refractive index of jade isIt is in line with its numerical test of 1.66, and it is necessary to protect the jadeiteThere is a flat rough stone of at least 3mm②Hetian jadeGem refractometer is suitable for identifying polished finished productsHetian Jade can test whether the refractive index of Hetian Jade isIt is a rough stone that meets its numerical value of 1.61③JewelryGem refractometer is suitable for identifying various types of gemsstone, the number of refractions fixed by its various varieties of gemstonesThe value is used to determine whether the rough stone matches the characteristics of the gemstone.④DiamondDigital gem refractometer for identification of natural diamondsAnd artificial diamonds, the refractive index reaches 2.417However, diamonds with refractive index between 1.98-2.2 are all artificial.Diamond, also known as zircon▶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*Gemstone refractometer2*calibration block (1*1.487, 1*1.806)1*aluminum box1*instruction manual▶If you have any questions about our products, please feel to contact us and we will reply to you within 24 hours.

• 【Professional Gemstone Identification Tool】: The data gemstone refractometer is composed of high-sensitivity sensors and LCD screens.It can measure the refractive index value of gemstones non-destructively, quickly and accurately, and can determine other optical characteristics of gemstones. Measuring range: refractive index 1.300-3.000.a measurement accuracy of up to 0.001, a measurement error of ±0.005.
• 【Clear Visual Reading & Extended Battery Life】: Jewelry Tester Identification Tool featuring a large LCD screen with backlight illumination, a high-sensitivity sensor, and intelligent electronics, the device ensures excellent readability even in low-light conditions. Powered by a rechargeable 700mAh lithium battery, it supports up to 10,000 measurements per charge, making it suitable for lab use, field gemology trips, and jewelry store applications.
• 【Test Method】: No refractive oil is required, just bring the sample's measuring surfaces close to the measuring platform to measure. Based on this parameter, you can determine whether the gem is a uniaxial crystal or a biaxial crystal.In addition, it is equipped with two calibration blocks of 1.487 and 1.806, which are calibrated before measurement to ensure that the measurement results are accurate.
• 【High Quality Materials】: The gem refractometer uses hard aluminum alloy to create a work surfaces, which is scratch-resistant and sturdy, providing stable support for precision testing. It is equipped with an ABS engineering plastic power switch and built-in triple insulation protection to effectively block the risk of leakage.
• 【Wide Compatibility For Various Gemstones】: Gemstone ldentification Tester Suitable for both uniaxial and biaxial crystals, this jewelry calibration test tools quickly and accurately identifies single and double gemstones—including moissanite, diamond, colored gems, natural or synthetic stones, minerals, and other solid materials. designed for measuring the refractive index of gemstones and solid materials. A must-have for gemologists and serious collectors.