Portable Jewelry Refractometer - Gemstone Tester for All Stones, Refractive Index 1.30-1.81 / Accuracy: 0.01, Lab Refractometers

★ Product Introduction:Jewelry Refractometer, Digital Gemstone Refractometer For All Stones, Accuracy 0.01, Refractive Index 1.30-1.80, For Test Jewelry. Can Measure The Refractive Index Value Of Gemstones Non-Destructively.★ Product Advantages:1. Small Size And Light Weight, Easy To Carry And Use.2.This Refractometer Features High Accuracy, Based On The Refractive Index, It Can Be Determined Whether A Gemstone Is A Uniaxial Crystal Or A Biaxial Crystal, And Whether It Is Positively Phototropic Or Negatively Phototropic.★ Products Specifications:Name: Gemstone Identification RefractometerMeasuring Range: Refractive Index 1.30-1.80Measurement Accuracy: 0.01Function: Authenticity Identification By Refractive IndexEyepiece Size: 1.6cm In DiameterTabletop: Low Dispersion, High Hardness Glass TabletopComes With Flashlight: Yes, (The Flashlight Is Powered By 1 Aa Battery, Battery Not Included)Product Size/Weight: 11x3.4x6cm/400g★ Packing List:Gemstone Refractometer*1Flashlight*1Refraction Oil*1English Manual*1

• ★ Working Principle: The Working Principle Of The Gemstone Tester Is To Measure The Refractive Index Of The Gemstone, The Refractive Index Is A Very Important Optical Parameter, According To This Parameter Can Determine The Characteristics Of The Gem.
• ★ Core Advantages: Jewelry Refractometer Has This Refractometer Features High Accuracy, Based On The Refractive Index, It Can Be Determined Whether A Gemstone Is A Uniaxial Crystal Or A Biaxial Crystal, And Whether It Is Positively Phototropic Or Negatively Phototropic. Lab Refractometers Anti-Scratch Anti-Corrosion, Long Service Life.
• ★ Precise Measurement: Digital Gemstone Refractometer For All Stones Measuring Range Is Refractive Index 1.30-1.80, Measurement Accuracy Is 0.01, Is Your Best Helper.
• ★ Small Size and Light Weight: Digital Gem & Glass Refractometer Is Small Size And Light Weight, With Flashlight(The Flashlight Is Powered By 1 Aa Battery, Battery Not Included)Long Service Life. Jewelry Calibration Test Tool For All Kinds Of Gemstones, Jewelry, Etc.
• ★ What You Get: Complete Refractometer Package Including Gemstone Refractometer*1, Flashlight*1, Refraction Oil*1, English Manual*1. Simple Operation And Easy To Use.