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

Accurately Identify Gemstones in Seconds: Portable Digital Refractometer for Jewelers, Hobbyists & Collectors (No Oil Needed!)Unlock Professional Gem Identification Anywhere! Refractive Index is one of the most critical properties for distinguishing gem species and verifying authenticity. This portable device brings lab-level precision to your fingertips, using the principle of total internal reflection.Lab-Grade Accuracy : 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.Durable, Portable & User-Friendly: 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.Long-Lasting & Efficient: Powered by a 700mAh battery providing approximately 200 measurements per charge – perfect for gem shows, field trips, or extended shop use.Complete Package for Success: Everything you need is included: Refractometer, Aluminum Box, Tweezers, Cleaning Cloth, Countertop cover, Calibration Blocks (1.487 & 1.806), and English Manual.Technical Specifications:Dimensions: 135.0 x 78.0 x 24.0 mm (5.31" x 3.07" x 0.94")Weight: 250g (0.55 lbs)Measurement Range: Refractive Index 1.300 ~ 3.000Accuracy: ±0.001Measurement Error: ±0.005Battery Capacity: 700mAh Lithium BatteryApprox. Measurements per Charge: ~200Important Notes:For optimal accuracy, always calibrate the device using the included calibration blocks (1.487 & 1.806) before each use session.★If you have any questions about our products, please feel to contact us and we will reply to you within 24 hours.

• ★【Gemstone Refractometer】: This Professional Jewelry Tester Identification Tool and identification tool is made of durable, scratch-resistant aluminum alloy, and is corrosion-resistant. The ABS power switch is insulated to prevent power leakage and unnecessary damage.
• ★【Diamond Identification Tool】: The Digital Gemstone Refractomete is the most important tool for gemstone testing and the most powerful tool for identifying gemstone types. It can non-destructively, quickly, and accurately measure the refractive index of gemstones and determine other optical properties of gemstones.
• ★【Operating Principle】: The Diamond Tester operating principle is based on total internal reflection. The digital refractometer does not require refractive oil; simply place the sample's measuring against the measuring platform for measurement.
• ★【Structure】: The Digital Gemstone Refractomete primarily features a highly sensitive sensor, intelligent electronics, and a large LCD display with backlight for comfortable viewing and clear, bright results.
• ★【Precise Measurement】: The jewelry refractometer is suitable for all gemstones. Measurement accuracy: 0.001, refractive index: 1.300-3.000, measurement error: ±0.005, and a 700mAh lithium battery with a battery life of 10,000 cycles, ensuring precise testing.