"Night Pearl" is a common ore called "fluorite" and a rare industrial raw material. Its main component is calcium difluoride, which is a chemical raw material for producing hydrofluoric acid. The night pearl is a crystal. It is difficult to process into a certain shape, but the processing cost is not very large. The main materials of the night pearl are fluorite, calcite and some diamonds, among which fluorite is the most common.

Second, the luminous principle of the night pearl

In physics, the luminous principle of the night pearl is that the phosphorescent stone absorbs external energy after being irradiated in the sun, and then releases this energy in the dark, forming a silvery white luster; This is closely related to trace impurities in mineral crystals.

Third, is the night pearl really "priceless"?

The luminous pearl is not a gem at all, and its value cannot be compared with single crystal diamond, ruby, sapphire and emerald. People have always had a sense of mystery about it. First, there are many legendary records in ancient books. Second, it "glows".

"Glowing" is not magic. Manganese-containing cleavage stone, rare earth-containing ore, barium-nickel ore, etc. Will shine. The "fluorite" luminous pearl will emit fluorescence or phosphorescence after absorbing external light. With the development of science and technology, it is as easy to make an "artificial night pearl" as artificial marble, diamond and crystal. Adding some luminescent substances to ordinary ore will make it glow, "just like the previous clocks and watches glow at night."

Fourth, is this light harmful to human body?

Experts say that the fake night pearl will emit fluorescence after being irradiated by strong radioactive sources, and some of them can last for three to five months or even a year. Many luminescent minerals contain radioactivity. If they have not passed the radioactive safety test, it is best not to approach or contact them for a long time.