An optical instrument used to examine and demonstrate the dichroic properties of crystals and minerals by showing how they appear in two different colors under different light conditions.
From Greek 'di-' (two) + 'chroa' (color) + 'skopeein' (to examine). Developed in the 19th century as a practical tool for mineralogists and gemologists to identify stones.
Unlike a dichrooscope which is more for scientific measurement, a dichroscope is a handheld tool—gem hunters in mines used them to spot valuable dichroic stones quickly!
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