Noctilucent stone

After tens of millions of years, some luminous substances in the earth have been concentrated in ores from the initial eruption of volcanic magma to the later geological movement. The stone containing these luminous rare elements, after processing, is known as the night pearl, which often has yellow green, light blue, orange red and other colors. If you put the fluorescent stone under a white fluorescent lamp, it will emit beautiful fluorescence, This luminous property is obviously shown as weak day and strong night. In addition, some handicrafts also use the characteristics of fluorite to make some ornaments with the name of "Night Pearl".
The "Night Pearl" is a natural and self luminous jewel that can be seen by the human eye in the dark.