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Methods, apparatus, and systems for evaluating gemstones

  • US 7,420,657 B2
  • Filed: 12/20/2004
  • Issued: 09/02/2008
  • Est. Priority Date: 12/22/2003
  • Status: Active Grant
First Claim
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1. A computer-implemented method, comprising:

  • generating a representation corresponding to an illuminated image of a gemstone viewed from an observation location, wherein said representation differentiates between light rays incident on said gemstone from a first range of incident angles and light rays incident on said gemstone from a second range of incident angles;

    evaluating said gemstone based on light rays said gemstone directs to said observation location which were incident on said gemstone from an angle within said first range of incident angles; and

    providing results from said evaluating to a user;

    wherein said gemstone is evaluated based on light rays of a first wavelength said gemstone directs to said observation location which were incident on said gemstone from an angle within said first range of incident angles and on light rays of a second wavelength the gemstone directs to said observation location which were incident on said gemstone from an angle within said first range of incident angles.

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