Fable FRG003 Gemological refractometer is a low-cost lightweight measuring instrument used by jewellers and traders of gemstones to measure polished stones over a refractive index range of 1.35 to 1.81 RI and has a clean aluminium table and a built-in light source. The instrument can also be used to identify whether a particular stone is Isotropic or Anisotropic (uniaxial or biaxial). Gemological (Gemstone) Refractometer is your primary and most powerful tool in gemstone identification. As with a typical critical angle refractometer, it will measure the Refractive Index of faceted stones.
It has high hardness CZ test table, with very low dispersion and the shadow edge is straight and clear. Scale range is 1.35-1.8 and has an easy to clean stainless steel table and Can identify singly doubly refractive gemstones quickly and accurately.
Uniquely designed low battery consumption and portable Approved by strict quality and safety standards for long and trouble-free life Guaranteed, high quality and accurate testing results