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metric diameter in mm (reverse side) Size Reference
Mirror-polished finish on European steel construction
Trusted by professional jewelers and metalsmiths worldwide
0mm center stone
Refractometer Nechamkim metric diameter in mm (reverseThe GemPro refractometer is a primary gemological instrument used to measure the refractive index of gemstones for accurate identification. Clear optics and an easy viewing lens make readings straightforward, helping you quickly determine one of a stones most critical optical properties. Features Measures refractive index for gemstone identification Easy viewing lens for clear scale observation Designed for professional gemological use Compact
