Professional Accurate Gemstone Refractometer, Jewelry Tester Identification Tools, Refractive Index 1.300-3.000, with LCD Screens, for Jewelry, Gold ＆ Silver and Diamond

★This Professional Gemstone Identification refractometer is equipped with a precision optical system and a wide measurement range (RI 1.300–3.000), allowing accurate identification of various gemstones such as diamonds, sapphires, rubies, emeralds, and more. It is an essential tool for gemologists, jewelry designers, and enthusiasts.★Key Features & Advantages:-Precision Measurement: Accuracy up to ±0.005, minimum scale value of 0.001, providing reliable data support for gem identification.-Large LCD Backlit Screen: Clear display even in low-light environments, easy to read data and reduce eye fatigue.-Durable Aluminum Alloy Table: Hardened material, ensuring long-term stability.-Insulation Switch: Made of ABS material.-Long Battery Life: Built-in 700mAh lithium battery, supports up to 10,000 measurements, suitable for field gemology applications.Technical Specifications：Measuring Range: Refractive Index 1.300–3.000Error: ±0.005Accuracy: 0.001Battery Type: Lithium Battery (700mAh)Battery Life: Approx. 10,000 testsProduct Dimensions: 13.5×7.8×2.4 cmNet Weight: 0.8 kgWhat’s Included:Gemstone Refractometer × 1Protective Case × 1User Manual × 1

• ★【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
• ★【Simplified Testing Procedure】Requires no refractive oil—simply position the gem’s measurement facet against the platform. Instantly determines crystal structure
• ★【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
• ★【Working Principle】The working principle of the refractometer is based on total internal reflection. The refractive index is a very important optical parameter, and the characteristics of gemstones can be determined based on this parameter
• ★【Wide Applications】 Gemstone ldentification Tester Quickly and accurately identify single and double gemstones, moissanite/diamonds/colored gemstones/crystals, designed for measuring the refractive index of gemstones and solid materials. widely used in gem jewelry stores, etc.