The dichroscope is an important pocket instrument used in the field of geology, and can be used to test transparent gemstones (crystals). Experienced geologists using pleochroism can successfully detect gemstones from other artificial stones using this instrument. There are two types of dichroscopes available: calcite and polarizing. Of the two, c...
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instrument for examining crystals for dichroism
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• (n.) An instrument for examining the dichroism of crystals.
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An instrument used to view the light passing through agemstone to determine the presence of dichroism.
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Di'chro·scope noun [ Greek
di- =
di`s- twice + ... color + ... to view.] An instrument for examining the dichroism of crystals.
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http://www.encyclo.co.uk/webster/D/60
A dichroscope is an optical instrument, usually consisting of an achromatized double-image prism of Iceland-spar, fixed in a brass tube, which has a small square hole at one end and a convex lens at the other, of such a power as to give a sharp image of the square hole. On looking through the instrument the square hole appears double, and if a dich...
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