Generally, natural noctilucent stones are based on the principle of radiation photoluminescence, which means that they are radioactive. Although the radioactivity is not strong, it is not recommended to wear it with you, and it is best for viewing.

The luminous reason of noctilucent is related to its rare earth elements and is caused by the related electron movement in minerals. When the electrons in minerals are stimulated by external energy, they change from low-energy state to high-energy state, and when the external energy stimulation stops, the electrons change from high-energy state to low-energy state, and this process will emit light.

Extended data

Luminous stone is fluorescent stone. The luminous pearl, also known as "luminous wall, luminous stone and luminous stone" in ancient China, is said to be a rare stone that can shine at night in the world. Some experts pointed out that the "night pearl" is actually fluorite that can emit light. Although China is a big fluorite mineral country, there are not many fluorites that can shine at night, so it is precious and priceless.

Joseph Needham, a famous British scholar, recorded in his magnum opus "History of Science and Technology in China" that ancient China people loved the night pearl because they thought it was spiritual and a treasure of town houses. So people regard it as a precious wealth. It can control the house and drive away all evil.

Some people in India call the night pearl "snake-eye stone", and Japanese scientist Ling Mumin sorted out the gem records at 19 16, calling it a sacred gem.

Baidu Encyclopedia-Night Pearl (a jewel that glows by itself in the dark)