Method for identifying and cultivating diamonds and natural diamonds by utilizing X-ray excited fluorescence and phosphorescence

Abstract

The invention discloses a method for identifying cultivated diamonds and natural diamonds by exciting fluorescence and phosphorescence with X-rays, which comprises a diamond to be detected, a camera for shooting, an X-ray generator for excitation and a control system, the method comprises the following steps: cleaning and wiping a tested diamond, and fixedly placing the tested diamond in front of an X-ray generator; x-rays are started under remote control, and the fluorescence luminescence condition of the diamond at the moment is photographed and recorded; the X-ray is closed under remote control, and after the X-ray is closed for several seconds, the phosphorescence luminescence condition of the diamond at the moment is photographed and recorded; according to the fluorescence condition of the tested diamond recorded in the step S2 and the phosphorescence condition of the tested diamond recorded in the step S3, judging that the tested diamond belongs to hot-pressed diamond, natural diamond or CVD diamond. According to the method, hot-pressed, CVD and natural diamonds can be quickly identified in a large scale, and the efficiency and the accuracy are high.

Description

technical field [0001] The present invention relates to the technical field of diamond identification, and particularly relates to a method for identifying cultivated diamonds and natural diamonds by using X-ray excitation fluorescence and phosphorescence. Background technique [0002] In recent years, cultivated (synthesized by hot pressing or CVD method) diamonds have developed rapidly, and their technology and quality have reached a level comparable to that of natural diamonds. Cultivated diamonds are large gem-level single crystals in synthetic diamonds, which have the same chemical composition, physical and chemical properties as natural diamonds, and are difficult to distinguish with the naked eye. Although the industry is gradually making a stricter distinction between cultivated diamonds and natural diamonds in terms of market attributes, product identification, application prospects and even price trends, in order to clear the consumer market and avoid confusion amo...

AI Technical Summary

Problems solved by technology

However, it is precisely because of the high similarity between the two that it may provide opportunities for criminals to replace natural diamonds with cultivated diamonds in order to obtain high profits, thus causing uneasiness and panic in the diamond industry and consumers

However, the existing detection methods are generally based on light-excited luminescence and reflection spectroscopy methods, which require the use of laser light sources and spectrometers. The required detection instruments are expensive and require professional and technical personnel to operate, and generally cannot perform a large number of detections.

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