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|Doos 03:37, 28 July 2006 (PDT)|
The spectroscope is a tool to examin which parts of white light are absorbed by a gemstone (as well as in other materials).
Materials can absorb parts of the electromagnetic spectrum and when the absorbed parts fall with in the visible range, that absorbed part will influence the color of the material.
When a gemstone is observed with a spectroscope, the absorbed parts show as dark lines and/or bands in the spectroscope image.
There are two types of spectroscopes used in gemology:
- Prism spectroscopes (based on dispersion)
- Diffraction grating spectroscopes (based on diffraction)
Types of spectroscopes
Diffraction grating spectroscope