Digital Gemstone Refractometer Jewelry Tester Identification Tool Measurement Error: ±0.005 / Accuracy: 0.001 / Refractive Index 1.300-3.000 for Jewelry Jade

* Characteristic:1. The large LCD screen with backlight design provides comfortable viewing and bright and clear effects.2. Made of hard aluminum alloy material, it is difficult scratch.3. Insulated material to prevent power leakage and unnecessary damage.Specifications:Measuring Range: Refractive index 1.300-3.000Measurement Error: ±0.005Measurement Accuracy: 0.001Lithium Power Supply Life: 10.000 TimesPower Supply: 700mA Lithium Power SupplyProduct Size: 13.5x7.8x2.4cm(5.31x3.1x0.94inch)Net Weight: 0.8kg(1.76lbs)* Products Include:- Gemstone Refractometer x 1- Box x 1

• * Premium Construction Materials：Crafted with hard aluminum alloy for scratch-proof work platforms, this instrument delivers robust structural integrity. Enhanced with ABS engineering plastic power controls and triple-layer internal insulation, it ensures secure protection against electrical hazards
• * Simplified Testing Procedure：Requires no refractive oil—simply position the gem’s measurement facet against the platform. Instantly determines crystal structure (uniaxial/biaxial) based on light behavior
• * Essential Gem Identification Instrument：As a cornerstone tool for jewelers, it performs non-destructive refractive index measurements (range: 1.300-3.000) with speed and precision. Critical for verifying gemstone authenticity through optical properties
• * Total Internal Reflection Technology：Utilizes fundamental optical principles where refractive index values serve as definitive indicators for material identification. Each reading provides reliable gem characteristic data
• * Comprehensive Material Compatibility：Accelerates identification for single/double refractive gems, diamonds, and colored stones. Engineered for solid materials requiring refractive index verification