What is the 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. In ancient times, the "night pearl" was also called "night pearl" and "bright moon pearl". The famous "Night Pearl" includes Picking Pearls, Hanging Plums, Stone with Heavy Pricks, Jade with Phosphorus and so on.
The "Night Pearl" circulated among the people in our country has peculiar luminous performance, which can emit various colors of glittering and translucent brilliance in a dim environment. The "Night Pearl" is the most mysterious, rare and precious treasure in China's 5,000-year history of civilization, which is privately owned by the imperial power. The Night Pearl has a profound historical background and cultural connotation.
According to historical records, during the Spring and Autumn Period and the Warring States Period, the "Night Pearl" has been regarded as a "famous vessel in the world", and its precious value is comparable to that of the "Heshi Wall".
Classification of night pearl
"Night Pearl" can be divided into two categories according to the different matrix materials.
1. The "night pearl" of animals and plants: It is well known that there are luminous people in the animal kingdom, such as the famous fireflies. Su Jaw's Duyang Miscellany in the Tang Dynasty records that in the first year, Nanchang offered a "night-bright rhinoceros".
There are many luminous plants, such as "Mu Wei Xi Zhi", "Shen Cheng Zhi" and "Qi Ming Jiu Guang Zhi" in Ganoderma lucidum recorded in Compendium of Materia Medica all emit fluorescence.
2. Mineral gemstone luminous pearl: From the point of view of solid physics, the matrix materials of mineral luminous pearl are all active crystalline phosphors in inorganic salts.
The so-called active crystalline phosphor refers to the crystal that has the ability of "emitting light" due to the lattice distortion of the crystal lattice, and this distortion is mostly caused by some heavy metal impurities (activators) contained in the matrix. For example, a small amount of Cu in ZnS can emit yellow-green phosphorescence, which is called matrix and Cu is called activator.
At present, there are more than 100 kinds of commonly used phosphors, all of which are divalent metals (Ca. Sr？ Compounds-sulfide, selenide, telluride, silicate, aluminate, tungstate, phosphate and halophosphate. "The Night Pearl", a rare treasure, has many magical and beautiful legends throughout the ages, especially in classical dramas, movies, novels and palaces, and there are many genres involving the Night Pearl. Since ancient times, emperors have acceded to the throne, and princes have returned to the DPRK. As a "treasure of the town house", the night pearl once accompanied the emperor and his children and grandchildren into the palace. Therefore, in ancient times, the night pearl became a symbol of a country's supreme, supreme, supreme and respected rights and wealth. In people's traditional consciousness, the night pearl covered with a thick mysterious veil personifies the authority of the emperor; It is also as sacred and deified as heaven, earth, sun, moon and stars.
Because the night pearl is rare and shrouded in a mysterious color, the world has a very strong desire and curiosity about it. In daily life, many relatives and friends, as well as treasure lovers and collectors often ask me questions about the night pearl. In order to help you understand the basic knowledge of the night pearl and solve the mystery of the night pearl, my article will be used as a discussion and shallow interpretation of the mystery of the night pearl.
Rare mineral characteristics of the night pearl
In the world, there are thousands of minerals in nature, among which more than 20 minerals can emit visible light under the excitation of external energy, which is the luminescence of minerals. For example: fluorite, diamond, spodumene, emerald and other rare minerals. The luminescent time of these luminescent minerals is long or short, and there are strong or weak differences. The most representative is fluorite with phosphorescence. It contains various rare elements, which are purple, pink, green, dark green and mottled. During the crystallization of fluorite minerals, a unique rare earth element enters the crystal lattice and forms its own light source "luminous center". Its Mohs hardness is 4~4.5. Its stone appearance is colorful and colorful. After processing, the small ones are beaded and the large ones are spherical. In the thick night, the beads are like starlight, and the ball is like a bright moon spitting silver. Moreover, some high-quality fluorite phosphorescence pearls are bright and lasting, which is the legendary "night pearl".