The only refractometer designed to "spot" read cabochons or small facets with diameters less than 1mm. Top of the line desk model with removable eyepiece magnifier that enlarges RI scale image. Hinged lid protects glass working area from dust & abrasion. Refer to affixed chart of most-used RI's. Polarizing Filter, dust cover & RI liquid included; ten (10) gram bottle.
This is a gently used unit.