GemLED Refractometer With M7 Docking Station Desktop Jewellery & Watch Multi-Functional Repair Tool with LED Lights Bergeon 5680

Bergeon 5680

Stone Size (mm): 20x13

fork & angled fork

When set upper and lower limit value

PRESIDIUM Gem Indicator is the industry's only multi-gemstone tester which utilizes the properties of electro-thermal conductivity and Presidium's signature

GemLED Refractometer With M7 Docking Station Desktop Jewellery & Watch Multi-Functional Repair Tool with LED Lights Bergeon 5680Innovative 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