High Precision Gemstone Refractometer with Built-in LED Light Source | For Accurate Jewelry Identification - 1.35-1.85 Measurement Range, 28mm Retractable Eyepiece, 2 Brig

Pecification:Name: Jewelry RefractometerMeasurement accuracy: ±0.002Ruler range: 1.35-1.85 black background high contrast ruler, clearer interfaceLight source: Built-in quasi-monochrome LED light source, wavelength 589±3nmExternal dimensions: 140mmX42mmX95mm (large size)Weight: 561gPower supply: Two No. 7 batteries or external DC3V DC power supplyPower switch: push button switch, two-speed brightness adjustment switchCountertop: All stainless steel countertop, corrosion-resistant, easy to cleanPacking List:Jewelry Refractometer*1

• Accurate Measurement: This Gemstone Refractometer is designed to measure the refractive index of solid materials, providing gemologists and jewelers with precise analysis for effective gemstone identification.
• User-Friendly Design: Equipped with a 28mm retractable eyepiece and diopter adjustment, this device features an internal scale display with a measurement range of 1.35-1.85, ensuring easy and clear readings.
• High Precision Operation: Engineered for high-precision performance, this lightweight and portable refractometer easily distinguishes between opaque and transparent gemstones with intuitive controls.
• Durable and Easy to Clean: Constructed with a wear-resistant stainless steel countertop, this refractometer is not only corrosion-resistant but also easy to maintain for long-lasting use.
• Versatile Applications: Perfect for quick and accurate identification of various precious stones, including moissanite, diamonds, and colored gems, making it an essential tool for jewelers and gem enthusiasts.