FIELD: physics.
SUBSTANCE: method of determining the position of at least one inclusion in a diamond involves providing material containing a chalcogenide of a group 16 element; raising temperature of the material to 100-400°C in order to achieve molten state; placing the diamond inside the material and establishing illumination wavelength used to illuminate the diamond so as ensure that the refraction index of the material is in the range of 0.1 times the refraction index of the diamond when the material and the diamond are in a defined temperature range. The diamond in the material is then illuminated and the illuminated diamond is then imaged to obtain images of the diamond and the position of at least one inclusion is determined based on the images of at least one inclusion in the diamond images.
EFFECT: high accuracy of determining value of a precious stone.
28 cl, 5 dwg
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