Crystals that will "fire"

Long ago, in Dongtou Village, Donghai, there was a hard-working, good-natured farmer named Zhao Er. On New Year's Eve this year, he rushed home from the field to the New Year. When passing through Haizhou, he saw a poor and sick old woman lying in the gate of the city. Zhao saw her poorly and gave her half of the silver she had earned in a year. The old woman took over the silver two, and she did not say anything. Zhao Er did not hurry out of the city. Within a short while, the Red Sun fell and the night fell. On the eve of the New Year’s Eve, there were no stars and no moons, and the sky was dark and black. Zhao Er’s difficulty in distinguishing the roads was difficult. He was guilty of being humiliated. There was a white fireball that fluttered to the front of Zhao Erliang. The crystal sparkles and shines on the road. Zhao Er is extremely surprised and walks away with Crystal Lightball. At the foot of Ushiyama, the lights of Chengtou Village are clearly visible, and Zhuang's sound of chicken dogs is heard. At this time, crystal light fireball suddenly throbbed three or three times, it seems that there is a human figure in the jaw first thanks, then "call" to break into the ground. Zhao is very surprised. It will go home again.

In fact, the sick old woman at the gate of Haizhou was a change of the crystal fairy in the sky. On the eve of the eve of the earth, people looked at the people's sentiments. When they encountered Zhao Er’s kind people, they took a crystal lamp to guide him. Zhao Er did not know the details. On the second day of the Lunar New Year's Day, he talked with the villagers about the adventures of the previous night. The older people said that he had met the immortal, and that there was definitely a baby in the crystal ball room. Zhao Er and Zhuang Ao came to the foot of the Ushiyama to dig with a trowel, less than three feet, and he really dug into a crystal clear stone.

This matter spread from then on, the villagers all know that there are babies around the Ushiyama, where the white light at night, where the underground crystal on the moon. Later, it is said that the villagers often excavate crystals according to white light.

Why does crystal catch fire? Since ancient times, crystal has been called "light stone." It turned out that the crystal is mainly produced in the quartz veins of the crystal hole. The common people called the quartz veins "Shilong." Shilong often empty. The bigger and thicker the stone dragon, the bigger the crystal hole and the crystal growth. Shilongyuan was formed in the underground and was stored in shallow ground or exposed to the earth's surface due to changes in the earth's crust and weathering and erosion. In the long-term changes, the caves can be filled with mud or gravel.

The movement of the earth's crust is constantly occurring. It is weak and strong and has not yet stopped. One of the important manifestations of crustal movement is the change of ground stress. The stronger the movement, the greater the ground stress and vice versa. Ground stress mainly refers to the lateral pressure of the crust.

Crystal has a "strange", when a certain pressure will produce a current, so that the crystal charged at both ends, in turn, when the pressure is high will produce oscillations, which is called the piezoelectric effect or piezoelectric phenomenon. However, in the underground crystal, under the action of the ground stress, it is easy to produce electricity effect. This effect will cause the surface air near the ground to change. The greater the ground stress, the stronger the piezoelectric effect, the greater the air change, when the air changes to To a certain degree, it will glow, that is, "fire."