Gemstone Refractometer, Professional Jewelry Tester Identification Tool with LCD Screens for Diamonds, Jade, Gold, Silver and Jewelry, Refractive Index 1.300-3.000, 0.001 High Accuracy Diamond Tester

► Tired of second-guessing gem authenticity and risking client trust? ► Fed up with messy refractive oils ruining delicate stones? ► Are you still anxious about confusing real diamonds with synthetic zircon, damaging your professional credibility?➥➥ This digital gem refractometer solves your biggest pain points with professional-grade precision and hassle-free using.✅【ADVANTAGES】1. Skip the messy refractive oils! Simply place your gem or solid sample onto the measurement platform for a fast, clean, and contactless reading.2. Features a high-precision sensor delivering measurements from 1.300 to 3.000 with an impressive accuracy of ±0.001 and error margin of only ±0.005.3. Crafted from lightweight yet rugged high-strength aluminum alloy (only 250g / 0.55 lbs), it withstands scratches, corrosion, and fieldwork. The bright backlit LCD display ensures clear readings anywhere.4. Long-Lasting & Efficient: Powered by a 700mAh battery providing approximately 200 measurements per charge.5. Complete Package for Success: Everything you need is included: Refractometer, Aluminum Box, Tweezers, Countertop cover, Calibration Blocks (1.487 & 1.806), and English Manual.6. Long Battery Life: Built-in 700mAh lithium battery, supports up to 10,000 measurements, suitable for field gemology applications.✅【SPECIFICATIONS】Product name: Digital Gemstone RefractometerMeasuring range: refractive index 1.300-3.000Measurement accuracy: 0.001Measurement error: + -0.005Battery 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 Refractometer1 * Calibration Block (1*1.487, 1*1.806)1 * Aluminum Box1 * Tweezers1 * Countertop Cover1 * Instruction Manual

• ✅【PROFESSIONAL-GRADE PRECISION MEASUREMENT】: Featuring a high-precision optical system, sensitive sensor and smart electronics, this digital gemstone refractometer offers non-destructive, fast and accurate refractive index (RI) measurements. With a 1.300-3.000 range, ±0.005 accuracy and 0.001 resolution, it meets most common gem identification needs, providing reliable quantitative data for professionals, gemologists and enthusiasts.
• ✅【OIL-FREE & EASY TO USE】: No refractive oil is required, unlike traditional gem testing methods. Simply place the gem’s measuring sur face close to the platform for instant results—this simplifies using and preserves the integrity of delicate gems. The jewelry tester identification tool comes with two calibration blocks (1.487 & 1.806) for pre-measurement calibration, ensuring consistent accuracy. You can also distinguish uniaxial and biaxial crystals based on the measured RI value.
• ✅【DURABLE DESIGN & LONG-LASTING PERFORMANCE】: Jewelry authenticity tester features a scratch-resistant, sturdy hard aluminum alloy workbench for stable precision testing. The ABS engineering plastic power switch and built-in triple insulation protection effectively prevent leakage risks. A large LCD backlit screen ensures clear reading even in low-light environments. Powered by a 700mAh rechargeable lithium battery, it supports up to 10,000 measurements per charge, suitable for labs, field trips and jewelry stores.
• ✅【WIDE COMPATIBILITY FOR GEMSTONES】: Suitable for both uniaxial and biaxial crystals, digital gem tester quickly and accurately identifies single/double gemstones, including moissanite, diamonds, colored gems, natural/synthetic stones, minerals and other solid materials. Not applicable to semi-finished products, poorly polished gems, stones smaller than 2.0mm² and rough stones. A must-have tool for gem appraisal institutions, processing factories, collectors and serious enthusiasts.
• ✅【RELIABLE WORKING PRINCIPLE & PORTABILITY】: Operates digital refractometer based on the principle of total internal reflection—RI, as a core optical parameter of gemstones, provides scientific basis for distinguishing gem types and judging physical properties. Weighing only 250g, the compact and lightweight design ensures easy portability. Its corrosion-resistant aluminum alloy shell extends service life, combining safety, convenience and durability for diverse application scenarios.