FIELD: physics.
SUBSTANCE: method involves recording optical density spectra of diamond crystals in the infrared range using a spectrometer. Absorption bands are determined after recording optical density spectra. Natural or artificial origin of colour is determined from the set and relative intensity of absorption bands in the 1360-7000 cm-1 range.
EFFECT: determining signs of artificial radiation exposure, as well as signs of artificial radiation exposure and subsequent annealing of diamond crystals.
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