dichroscope

/ ˈdaɪkrəˌskəʊp, ˌdaɪkrəˈskɒpɪk /

noun

1. Also called: dichroiscope.  dichrooscope. an instrument for investigating the dichroism of solutions or crystals

Other Word Forms

• dichroscopic adjective

Word History and Origins

Origin of dichroscope¹

C19: from Greek dikhroos two-coloured + _-scope

Example Sentences

In order to see the axial colours separately the crystal must be examined with a dichroscope, or in a polarizing microscope from which the analyser has been removed.

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The use of the dichroscope is so simple that it can be applied by any one to the examination of a cut stone, but there are other means of determining the nature of a stone by its optical properties available to the mineralogist and more suitably discussed under Crystallography.

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The emerald is dichroic, giving in the dichroscope a bluish-green and a yellowish-green image.

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The dichroscope also serves to detect the false character of doublets and paste imitations, as neither shows dichroism.

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To find out with a finished stone whether or not the lapidary has cut it properly as regards its optical properties one may use the dichroscope, and if there is little or no dichroism in evidence when looking through the table of the stone it is properly cut.

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