 Professionals,
serious collectors and hobbyists can't be without the instrument most gemologists consider
the most important gem identification instrument available.
The primary use of the refractometer is to measure the angle at which
light travelling through a stone is bent or refracted. This measurement is called the
Refractive Index (R.I.). Since the R.I. differs for every stone, the measurement provided
by the refractometer indicates the identity of most stones.
Now available is the RosGem Precision Pocket Model compact, high quality, and high
precision that fits right in your pocket! Bring it with you to shows, on buying trips, and
in the field to eliminate costly mistakes. Test loose or mounted stones with RI readings
ranging from 1.300 to 1.800.
First bottle of refractive index liquid is 25% off with
purchase of any Refractometer |
