It is formed by some luminous substances in the earth after tens of millions of years, from the initial volcanic magma eruption to the later geological movement, gathered in the ore. After processing, the stones containing these luminous rare elements are what people call the night pearl, which is often yellow-green, light blue, orange and other colors. Fluorescent stone under white fluorescent lamp will emit beautiful fluorescence, which is obviously weak in the day and strong at night. In addition, some handicrafts also use the characteristics of fluorite to make some ornaments called "Night Pearl".
"Night Pearl" is a kind of natural gem, which can be seen clearly by human eyes in the dark and can glow by itself. The night pearl is extremely rare. We can not only use the scientific detection instruments of precious stones, but also identify their authenticity according to their many characteristics.
Identification method
Nature:
(1) bright 15 minutes later, light gray fluorite that can continuously emit light for dozens of hours.
(2) Phosphorescence can not only produce the imitation effect of the night pearl.
(3) Bright colors, translucency, permanent active luminescence without any illumination, and large light energy.
(4) It is necessary to distinguish the fluorescence and phosphorescence of fluorite. Phosphorescence is the function of external light source, which can keep a certain luminous time after removal.
(5) Observe its luminous length, uniformity, half-life and afterglow.
Manual:
(1) The fluorescent powder is filled in the cracks of fluorite which does not emit light, and it only emits light locally or linearly.
(2) After the light-emitting part is illuminated, the time is short and fleeting.
(3) Filled with luminescent materials, the defects are clear, there are obvious traces, and it is easy for the naked eye to see through.
Due to the high value of pure natural night pearl, we should take a serious and earnest attitude when identifying the authenticity, and have the identification certificate issued by the authoritative national gem testing institution as the basis.
We can consider whether it is a meteorite night pearl. Provide some information:
In Mr. Peng's home in Huize County, Qujing, Yunnan, there is a luminous treasure known as the "night pearl" of meteorites.
This rough stone is not much different from ordinary stone. According to the measurement, the original stone is 1 2cm long, 7. 1 cm wide and 5.2cm thick, and weighs1kg, which is 7 times the weight of the known luminous pearl133.3g in Cixi Mouth. The surface of the stone is brown-blue, with a large number of uniform depressions.
High hardness. Mr. Peng gently cut the glassware with this stone, and you can see many scratches. Under the irradiation of a flashlight for a few seconds, you can clearly see the green light source at night and it can last for a long time. According to Teacher Peng, if you absorb light and heat in the sun for a few minutes, you can continue to shine for three days and three nights. A * * has three layers of light sources, one is green, the middle layer is light blue, and the innermost layer is white, which is particularly eye-catching in the dark, like a big jade inlaid with gems, illuminating the whole room.