Featuring a sturdy metal body design, it ensures the device's stability and long service life, providing reliable results for professional gemstone testing and evaluation work
It has a refractive index measurement range of 1.30 to 1.81, covering the test values of most common gemstones; meanwhile, it offers stable performance, high precision and simple operation
The package includes 30ml refractive index fluid and an LED flashlight, which help improve measurement clarity and make measurement results easier to read
It can quickly and accurately identify single and double gemstones, and at the same time, it can observe the optical properties and structure of gemstones to meet multi-dimensional testing needs
It is the most important and powerful tool for identifying and authenticating polished gemstones and semi-precious stones, providing key support in the field of gemstone testing
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