The invention includes: a barcode for reading a management number and measurement inspection company information of a polished mined diamond; a two-dimensional code for reading 4C information bound to the management number, the size information of the diamond, and optical virtual reflected images in the respective cases of the presence and absence of a color filter of the diamond created by CG software; and a field for outputting and displaying the 4C information output and displayed from the two-dimensional code and a size display field of the diamond, wherein the optical virtual reflected image in the absence of the color filter and the optical virtual reflected image in the presence of the color filter are output and displayed from the two-dimensional code and the computer database.
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