There are many jadeites that have been artificially treated, and there will be no fluorescence reaction under the irradiation of purple light. The principle of detecting jadeite (and other precious jadeite) by purple light is that the fluorescent agent will fluoresce under this wavelength of light.

Many fakes will not have a fluorescent reaction if they are not exposed to fluorescent agents during processing. Those B goods with fluorescent reaction are basically fillers containing fluorescent agents.

Purple light can not only detect jade, but also detect whether plastic products such as clothes at home contain fluorescent agents.

Many people bought the wrong purple flashlight. There are many kinds of purple flashlights, and their functions are different according to different wavelengths. In order to identify jadeite, purple light with a wavelength of 365 nm is usually selected. The light emitted by true violet light with the wavelength of 365nm is violet-free, which can better distinguish the fluorescence reaction.

If your purple light itself is purple, you bought the wrong 395 nm purple light.

Nowadays, jewelry and jade will be accompanied by an appraisal certificate, but everyone knows that it is not necessarily true to have an appraisal certificate. It's probably a fake with a fake certificate.

There are many methods to judge the authenticity of authentication certificates on the Internet, but they are not comprehensive, and many methods are useless.

To judge whether a certificate is issued by a formal institution, there are many things to query, and many materials are difficult for ordinary people to verify.

However, not all jadeites will glow under purple light. So, if they don't shine, it doesn't necessarily mean they are fake. Further verification is required by other means.