AN APPARATUS AND METHOD FOR VIEWING MARK FORMED ON THE SURFACE OF A DIAMOND OR GEMSTONE

摘要

An apparatus for viewing a mark which has been formed on the surface of a diamond or gemstone, comprising diffused irradiation means for irradiating at least a portion of said surface of the diamond or gemstone with diffused radiation; direct irradiation means for irradiating at least a portion of said surface of the diamond or gemstone with direct radiation; viewing means for producing a fIrst image of at least a portion of said s~ace of the diamond or gemstone when irradiated with diffused radiation and, by direct reflection from said surface when irradiated with direct radiation, a second image of at least the portion of said surface of the diamond or gemstone on which the mark is formed; and display means for displaying said fIrst and second images.