METHOD FOR ASSESSING DIAMOND QUALITY

摘要

PCT No. PCT/GB86/00784 Sec. 371 Date Aug. 6, 1987 Sec. 102(e) Date Aug. 6, 1987 PCT Filed Dec. 19, 1986 PCT Pub. No. WO87/03963 PCT Pub. Date Jul. 2, 1987.A method for assessing diamonds of differing quality characteristics in which a laser Raman spectrometer is initially calibrated by use of diamonds of known quality characteristics, the characteristics having been assessed for example by a conventional subjective procedure. Diamonds of unknown quality characteristic are successively placed in the spectrometer and irradiated with laser radiation of known frequency. The intensity of the scattered Raman signal from the diamond of unknown quality is monitored for one or more orientations of the diamond, the resultant signal being capable of relation to the quality of the diamond.