GemLED Refractometer With M7 Docking Station bench All punches and stakes are

All punches and stakes are fitted in a numbered gilded metal plate

Special care is given to ensure that each stone is neither on the low nor the high end of the color chart and that it is distinctly and equally apart from the two adjacent stones

5 * 8 * 3cm / 5

it can service well in field of maintenance of auto

GemLED Refractometer With M7 Docking Station bench All punches and stakes areInnovative gemstone refractometer with built in LEDs for mains and battery operation. Refractometer contact liquid ND 1. 79 and polarization filter included. Refractive index: nD 1. 30 1. 81, scale graduation 0. 01 for an easy, direct and accurate reading Monochromatic illumination with powerful LEDs 589nm of the sodium D wavelength, arranged directly on the refraction element within the refractometer housing, for a sharp and high contrast image of