The ancients once said that the night pearl was a cetacean. About Ren Liang's defense, The Tale of a Vision says: "There is a pearl in the South China Sea, which is the eye pupil of a whale. Whales die without eyes and can learn, which is called luminous. "
Some scientists in modern times think that they may be several special gem minerals. According to the research of geologists, a few minerals in nature, such as diamond, apatite, barite, fluorite, scheelite, staggered stones, crystals and other impurities, will emit light under the stimulation of external energy, such as heating, friction, electricity, ultraviolet rays, X-rays or cathode rays.
19 16 years, Japanese gemmologist Min wrote in gemological records that Japan's luminous pearl is a special red crystal, which was named "sacred gem". Joseph Needham, a contemporary British scholar, thinks that luminous jade is fluorite. Some people in our country speculate that some gems can be exposed to the sun during the day and glow at night. The ancients may have processed these things into round beads or other shapes, that is, luminous walls or luminous beads recorded in ancient and modern Chinese and foreign legends or historical books.
According to the report of Hebei Science and Technology News 1984, a light brown fluorite was found in a mineral belt in Guangdong, which confirmed that the luminous pearl recorded in history books really existed and was not hidden in China. But these luminous minerals need to be stimulated by external energy in advance, which is different from what is described in ancient books. Do you have any jewelry that can shine without glowing? It is said that after the death of Empress Dowager Cixi, there was such a pearl in her mouth.
In the words of Liangzhou in Tang Dynasty: "Portuguese wine luminous cup, if you want to drink pipa, you should rush it immediately." It has been well received for many years. It is impossible to prove when and where the luminous cup first appeared. In recent years, Jiuquan, Gansu, the hometown of Liangzhou, has also produced luminous cups. The raw material is collected from Qilian Mountain, and some people call it noctilucent stone. However, this Qilian jade belongs to Yang Yanyu, and it doesn't glow at night. It has been pointed out that today's luminous cups are not ancient luminous cups. But some people think that the ancient luminous cup itself can't shine. Then why is it called a luminous cup? There are different explanations. Some people say that the luminous cup is thin. When it is full, it reflects the moon and the moonlight is poured into the cup. Moonlight penetrates the glass wall and reflects the color of wine, which is a strange brilliance. So it's called luminous cup or luminous cup.
In view of the fact that archaeologists have not found real cultural relics such as the luminous pearl, luminous wall and luminous cup underground, and have not seen similar minerals in nature, it is still a mystery whether they have strange properties.