According to geologists, there are indeed a few minerals in nature that glow when stimulated by external energy. Such as some impurities such as diamond, apatite, barite, goose stone and crystal.
Joseph Needham in contemporary Britain thinks that the luminous pearl is fluorite, and some people in China speculate that some precious stones can shine at night after being irradiated by the sun during the day. The ancients may have processed these things into round beads or other shapes, which are the night pearls recorded in ancient and modern Chinese and foreign legends or historical books.
According to Hebei Science and Technology News 1984, a light brown fluorite was found in a mine in Guangdong, which confirmed the existence of the night pearl described in historical books. These luminous minerals need to be excited by external energy in advance, which is not the same as described in ancient books. Do you have any jewelry that can shine without glowing?
Wang Han, a poet in the Tang Dynasty, wrote Liangzhou Ci, a luminous glass of grape wine, and wanted to drink pipa immediately. It has been well received for many years. Then why is it called a luminous cup? Some people say that the wall of the luminous cup reflects the moonlight on the moon, and presents a strange brilliance through the wall, including wine, color, fragrance, glow and light, so it is called the luminous cup or the luminous cup is full.
In view of the fact that archaeologists have not found real luminous beads underground, such as luminous cups, or similar minerals that can emit light permanently without external energy stimulation, the existence of real luminous beads is still a mystery.