Methods, apparatus, and systems for evaluating gemstones

Details Methods, apparatus, and systems for evaluating gemstones Methods, apparatus, and systems for evaluating gemstones

2008-05-22

2009-08-25

Lauchman, L. G (Department: 2877)

Optics: measuring and testing

Crystal or gem examination

Reexamination Certificate

active

07580118

ABSTRACT:
Methods for grading gemstones, apparatus for grading gemstones, and systems that utilize such methods and apparatus are disclosed.

REFERENCES:
patent: 5966673 (1999-10-01), Shannon, Sr.
patent: 7372552 (2008-05-01), Sasian et al.

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