Spectroscope

Spectroscope

A small hand optical device for obtaining and visually observing spectrum, in which collimated light passes through a narrow slit onto either a prism or diffraction grating, its spectrum being viewed by a lens system or telescope. The angle between the collimator and telescope can be varied. It is useful instrument for identification of gemstones.

See Alexandrite Tsarstone collectors guide, Definition of Spectroscope, http://m.alexandrite.net/viewpage.html?id=GG-104-00004 (A small hand optical device for obtaining and visually observing spectrum, in which collimated light passes through a narrow slit onto either a prism or diffraction grating, its spectrum being viewed by a lens system or telescope. The angle between the collimator and telescope can be varied. It is useful instrument for identification of gemstones.) (as of Apr. 03, 2026, 14:12 GMT).