Method and apparatus for identifying gemstones, particularly dia

Details Method and apparatus for identifying gemstones, particularly dia Method and apparatus for identifying gemstones, particularly dia

1990-10-19

1992-06-02

Evans, F. L.

Optics: measuring and testing

Crystal or gem examination

2504611, G01N 2164, G01N 2187

Patent

active

051181819

ABSTRACT:
A method of identifying a gemstone, particularly a diamond by: exciting the gemstone to cause it to emit luminescence radiation according to a luminescence spectrum unique to the respective gemstone, in which the luminescence intensity uniquely varies as a function of wavelength; measuring the level of the luminescence radiation at a plurality of preselected wavelengths of its luminescence spectrum; and utilizing the levels of the luminescence radiation at the preselected wavelenths to identify the respective gemstone and to distinguish it from other gemstones.

REFERENCES:
patent: 4394580 (1983-07-01), Gielisse

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