Professional Digital Gemstone Refractometer for Jewelry, Ruby, Jadeite, Sapphire, Diamond, Lab Use

Are you still concerned about quickly distinguishing genuine diamonds from imitations, without compromising your professional credibility? The Beachtiful Gemstone Refractometer uses precise refractive index measurements—an undeniable physical property—to instantly verify diamond authenticity, empowering professionals with reliable results. **Advantages** 1. No messy refractive oils required! Simply place your gem or solid sample on the measurement platform for a fast, clean, and contactless reading. 2. Equipped with a high-precision sensor, it measures refractive indices from 1.300 to 3.000 with an accuracy of ±0.001 and a margin of error of just ±0.005. 3. Built from lightweight yet durable high-strength aluminum alloy (only 250g / 0.55 lbs), it resists scratches, corrosion, and field conditions. The bright backlit LCD ensures clear readings in any environment. 4. Long-lasting & Efficient: A 700mAh battery supports approximately 200 measurements per charge. 5. Everything Included: Refractometer, aluminum case, tweezers, countertop cover, calibration blocks (1.487 & 1.806), and English manual. **Specifications** Size: 135 x 78 x 24 mm (5.31" x 3.07" x 0.94") Weight: 250g (0.55 lbs) Measurement Range: Refractive Index 1.300 ~ 3.000 Accuracy: ±0.001 Measurement Error: ±0.005 Battery Capacity: 700mAh Approx. Measurements per Charge: ~200 **Notes** For best results, calibrate the device using the included blocks (1.487 & 1.806) before each use. If you have questions about the product, email us—we’re here to assist promptly.

• Gem Refractometer with High Precision Sensor Measures Refractive Index Based on Total Internal Reflection Principle for Reliable Gem Identification
• Precise Gemstone Refractometer with High Accuracy, Measures Refractive Index from 1.300 to 3.000, Non-Destructive Testing, Error as Low as ±0.005, Ideal for Jewelry Identification
• Easy to use gem refractometer measures without refractive oil, simply place sample on platform to determine uniaxial or biaxial. Includes 1.487 and 1.806 calibration blocks for accurate results.
• Portable Jewelry Refractometer With LCD Backlit Display, High-Strength Aluminum Alloy Shell For Scratch And Corrosion Resistance, Built-In Triple Insulation Protection, Only 250g
• Gemstone Refractometer For Measuring Refractive Index Of Single Crystal, Twin Crystal, Diamonds And Colored Gemstones, Widely Used In Jewelry Appraisal, Gem Processing And Collecting