According to geologists' research, rain flower stones were formed from 2.5 million years ago to 6.5438+0.5 million years ago. It is a mixture of timely, chalcedony, flint or opal, which is formed by the earth's magma spouting from the crust, leaving holes after solidification, and trickling into the rocks along the holes.
The color and pattern of rain flower stones are only inclusions in the process of gradual separation and continuous precipitation of colorless transparent body silica. Appreciate the rain flower stones carefully. There are mountains and rivers, clouds, immortals, flowers, birds, insects and fish in it. They are colorful and varied. People like to put it in a water bowl and display it in the study and desk. This is an elegant thing.
Extended data:
Anecdotal allusions
In the Jin and Yuan Dynasties, although there were no more historical materials at hand to reflect the history of the rain flower stones in the past hundred years, the story of Stones on the River can be described as a classic of this period, which is enough to show that everyone's favorite rain flower stones and even Hao Jing in adversity will "surprise, throw it into a clear spring, smoke it in a dish, and get a bright moon" (Hao Jing)
After 61 years of Qianlong and six southern tours, Nanjing is a must. There are five poems with the theme of Yuhuatai, such as "Yuhuatai Slogan" and "Yuhuatai Story". On the landscape stone beside Mochou Lake, there is a poem "Don't scoff at a stubborn stone, it is ugly, and the emperor used it to mend the sky".
1June, 1992, in the China Ornamental Stone Exhibition held by the Museum of Chinese Revolution, there were four pieces of rain flower stones that Emperor Qianlong liked provided by the Palace Museum. One of the dragon heads is amazing, and it is hidden by the "real dragon emperor", which gives people a deeper impression.
Baidu encyclopedia-yuhuashi