Gemstone Refractometer, Portable Professional Jewelry Refractometer with 28mm Retractable Large Lens, Gemstone Identification Tool, Built-in Led Light Source, for Jewelry Testing

This professionally crafted, accurate gemstone refractor features a sturdy, stable stainless steel surface and a large 28mm eyepiece with retractable diopter adjustment for a clear field of view. It can accurately determine the refractive index of different gemstones. It's an essential tool for measuring light refraction in gem identification and material testing, meeting diverse needs.SpecificationName: Gemstone 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±3nmPower supply: batteries or power supplyPower switch: push button switch, two-speed brightness adjustment switchCountertop: Stainless steel countertopExternal dimensions: 14cmX4.2cmX9.5cm/5.5x1.7x3.7inNet Weight: 561g/1.2IbPackage Content1 x Gemstone RefractometerNote1. Due to light and personal differences in color understanding, there will be small color difference, in kind, prevail.2. Due to different measurement methods, the error is generally 1 - 2 cm, and the error range is not within the quality range.

• 【High-Quality Materials】: This gem refraction instrument features a sturdy, stable, and easy-to-clean stainless steel table. It supports two power modes: battery operation (not included) or plugging directly into a power source. A built-in LED light source ensures stable illumination
• 【High-Precision Operation】: The instrument is lightweight and portable, with simple and intuitive operation, effectively distinguishing between opaque and transparent gemstones. Its precision construction enables high-precision measurements, making it suitable for a variety of testing environments
• 【Precise Reading】: Equipped with a 28mm retractable eyepiece for adjustable clarity. The internal scale displays a range of 1.35-1.85, and offers two-speed brightness adjustment for clear and accurate readings
• 【Gem Testing】: This instrument professionally measures the light bending properties of solid materials and gemstones, analyzing light refraction and providing a reliable basis for identification. It is suitable for quickly identifying single gemstones or groups of gemstones
• 【Versatile Applications】: It can test common gemstone types such as moissanite, diamond, and colored gemstones. It is an essential tool for measuring light refraction in gem identification and material testing, meeting diverse needs