What are some interesting stories about weather stones that can predict the weather?

In nature, there are some strange stones, which are closely related to meteorology. There is a strange stone about 2 feet high in the home of a farmer in Chenge Village, Xiya Township, yi county, Anhui Province. There are two aspects to calling it strange. First, the shape is peculiar: the whole stone statue is a rockery, with vertical and horizontal gullies, natural texture, camel-like, and both form and spirit. The second is its unique function: it can accurately display the local weather changes. When the rockery is white, it means that the sun shines and the sky is clear and Wan Li; When confession turns to gray, the weather turns from sunny to cloudy; Once the stone turns dark gray and the peak of the rockery is dark, it means that light rain is coming; When the whole rockery is soaked with ink and the whole body is wet, it means that heavy rain and flash floods are about to break out.

Coincidentally. There is also a strange boulder in Banjia Township, Sandu Autonomous County, Guizhou Province. Since the 1970s, it has been found that it has the function of forecasting weather changes, and its accuracy is no less than that in TV and radio, and it has been praised as "the sunny stone" by local people. If the stone surface is white, it means the weather is sunny and sunny; If the stone surface is black, it means that the wind and rain are coming; If it turns from black to white after a long rain, it indicates that the weather will turn from rainy to sunny.

There are also strange stones that can predict the flood season. There is a boulder at Huaicun Ferry, Dongxing Township, Huanjiang County, Guangxi Zhuang Autonomous Region, China, which rises from the bottom of the river and tends to the east. At first glance, this stone is no different from ordinary stone, but strangely, it will change color at the part exposed to the water. Sometimes it is red, sometimes it is green, and then it is yellow. When the stone is red, the river will rise in 2 ~ 3 days, and the deeper the color, the higher the water level will rise. After rising, the red color fades and cyan or yellow appears.

People call these strange stones that can predict weather changes "meteorological stones". How do meteorological stones predict weather changes? Some scientists believe that this may be the result of the color change of stone surface caused by the relative change of atmospheric pressure and air humidity. However, it is still an interesting "natural mystery" why the same change of air pressure and humidity will not change the color of ordinary stones.