Refractometer for gemstones from Krüss are available as a professional refractometer compact with LED lighting or filter sodium (ER601)
Refractometer very economic suitable for students of Gemology, offices and jewelry stores. Includes polarizer filter light, filter, monochromatic...
Refractometer-prism of cubic zirconia for added durability Scale of 1.35 to 1.85, with a precision of 0.003
Refractometer for gemstones from Krüss are available as refractometer standard with filter sodium and LED lighting sold separately .
Classification and quality control of precious stones, Krüss offers two models of refractometers, the ER601 and the ER604. Classification and...