METHOD OF IDENTIFYING ROUGH DIAMONDS, CUT DIAMONDS AND OTHER PRECIOUS STONES Russian patent published in 2011 - IPC G01N21/87 

FIELD: physics.

SUBSTANCE: digital images of a precious stone are obtained when said stone is illuminated by a light source in the visible region and luminescent when the image is exposed to UV radiation. The obtained digital images undergo mathematical processing to obtain a graphical presentation of the distribution bar chart of pixels on the mutual relationship of components R, G and B, used to form the pixels, and a digital code based on coefficients of a polynomial which approximates the bar chart.

EFFECT: reliable inspection of precious stones, possibility of establishing natural or artificial nature of a crystal, possibility of distinguishing a precious stone from a fake stone, and a simple and more efficient process of separation during benefaction of raw material.