Distinguishing natural from synthetic diamond

Details Distinguishing natural from synthetic diamond Distinguishing natural from synthetic diamond

G - Physics

01

N

G01N 21/87 (2006.01) G01N 21/64 (2006.01)

Patent

CA 2157469

In order to provide a method of distinguishing natural from synthetic diamond which does not involve costly equipment of long periods to make a measurement, a diamond (1) is irradiated with ultraviolet radiation which is preponderantly of wavelength 225nm or less, such that substantially only the surface region of the diamond is irradiated. By observing the pattern of luminescence and/or phosphorescence produced by the diamond (1), an observer can identify the diamond (1) as a natural or synthetic diamond. In an alternative method, a diamond can be placed in an electron beam and the pattern of luminescence and/or phosphorescence produced by the diamond observed in order to determine whether there is a layer of synthetic diamond deposited upon the diamond.

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