Xylem E-Line Gemological Refractometer - Manual (Page 3)

Product Description
Refractive Index is one of the most important optical parameters used to identify and authenticate
polished precious and semi-precious gemstones. The E-Line Gemological refractometer is a low
cost, lightweight measuring instrument used by jewellers and traders of gemstones. The
Gemological refractometer can also be used to identify whether a particular stone is Isotropic or
Anistropic (uniaxial or biaxial).
Upper
cover
Prism
Body
Eyepiece
Polariser
Light entrance socket
Torch
Filter
Attention and Maintenance
CAUTION:
The instrument is a delicate scientific instrument and should be treated accordingly. It has
no user serviceable parts. After use, the instrument should be placed in its carry case and
stored in a dry place. Remove battery from light source (torch) after use to prevent acid
leakage on to the instrument. Take care with contact liquids (CAUTION: Contact Liquid
– Read Material Safety Data Sheet).
Page 2