This is a desk model refractometer used by professional gemologists and jewelers. The hinged lid protects glass-working area from dust and abrasion. There is a removable eyepiece magnifier that enlarges RI scale image and a polarizing filter. RI liquid included.
Use to view gem’s pleochroic colours in sharp contrast can help separate doubly refractive stones like ruby from singly refractive garnets and red spinels. 5 cm length.
Hand Held Prism Spectrometer
Pocket model and convenient to use. This hand held prism spectroscope has a draw tube focus and slit adjusting ring for clear spectra. 9 cm length.