Method for grading gemstone cut and symmetry

Details Method for grading gemstone cut and symmetry Method for grading gemstone cut and symmetry

2007-03-20

2007-03-20

Toatley, Gregory J. (Department: 2877)

Optics: measuring and testing

Crystal or gem examination

Reexamination Certificate

active

11119984

ABSTRACT:
An apparatus and associated method for the direct and objective grading of the cut and symmetry of gemstones is provided. The apparatus comprises a laser, an integration sphere, and a gemstone holder, which together measure certain optical characteristics of the gemstone. Optionally, the gemstone holder mechanically rotates and the integration sphere connects to a data recorder such that a plurality of measurements may be recorded and analyzed. The associated method provides a method for interpretation of the data generated by the apparatus as the data relates to the cut quality and symmetry of the gemstone.

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