Coincidentally, Hua Feng has recently begun to learn everything about meteorites.

Slowly, he learned that the transparent molten crust on the surface of the lunar meteorite belonging to volcanic rock was formed by the melting of the transparent material in the lunar rock at high temperature. Other melting phenomena such as crusts, melt patterns, flow lines, grooves, craters, and edges and corners formed by directional falls are evident.

The transparent molten crust of lunar meteorites is a sign of lunar meteorites. Lunar igneous meteorites that have been severely eroded by wind have increased the likelihood of losing their transparent molten crust due to falling to Earth for too long, and this phenomenon usually does not affect the final identification of lunar meteorites.

Granular and massive clustered double-crystal aggregate plagioclase and microban molten breccia are commonly found in lunar meteorites. The colors are colorless, white, dark gray, flesh red, pink, yellow, light yellow, green. Glassy luster, transparent to translucent. Tabular or flat columnar single crystals are often white, and needle-like olivine can be seen in tabular single crystals.

Lunar meteorites have the characteristics of breccia plagioclase, which is an important scientific basis for confirming lunar meteorites. The meteorite of the Martian meteorite is called the 'Martian meteorite', and the Martian meteorite is also a very rare meteorite species, the more well-known ones are the '84001' Martian meteorite containing organic matter, and a 'quasicrystal' olivine meteorite, and the olivine porphyry 'Edenite Martian meteorite' with oxygenated iron and silicon water molecules.

In ancient times, meteorites were often regarded as sacred objects. For example, the ancient Romans used meteorites as messengers of the gods, and they built bell towers to worship them at the place where the meteorites fell. The Hungarians carried the meteorite into the church and chained it to prevent the "gift of God" from flying back into the sky. Mecca, the holy site of the church, also has a meteorite, which is considered a "holy stone". In some ancient civilizations, meteorites are often used as burials for emperors and dignitaries.

This is how the meteorite rain that fell on the land within a radius of 500 miles from Huadian, Jilin Province. Among them, the "No. 1 meteorite" fell near the birch bark factory in Yongji County, escaped more than 6 meters underground, and a mushroom cloud rose, and the shaking it produced was equivalent to a 1.7-magnitude earthquake, and the furniture in the nearby houses was toppled, and the cups and bowls were broken.

What is more, it was a meteorite that exploded over the Tunguska region of Siberia, which not only shattered the glass of residential buildings 100 miles away, but also reduced the forest in a radius of 30 miles to ashes. Directly below it, several "charcoal trees" actually stood upright, because the high pressure generated at the time made them strong. When the meteorite exploded, even Moscow in the evening was like daylight.

The more expensive meteorites in the world are meteorites from the Moon and Mars, about 6,000 US dollars, that is, 30,000 yuan per gram, and cheap desert meteorites have a high degree of weathering, which is 1 yuan per gram, and if there are many witnesses when falling, the price is 40 yuan to 50 yuan per gram.

At present, among all kinds of meteorites in China, the value of the meteorite called black treasure green is higher than that of the lunar and Martian meteorites, because at present human beings cannot judge its source, it is very likely to be from the planet produced during the Big Bang period of the universe 15 billion light years away, which is very helpful for the study of the cosmic boundary and formation, in the process of passing through the atmosphere, falling into the earth's desert after high-speed autobiography, so it is well preserved, the molten shell is relatively complete, the surface is bright, the whole body is black and green, and it has a high collection and research value.

The most well-preserved 2,750-gram black treasure green meteorite in China was acquired by a mysterious collector in Beijing at a price of 40 million yuan, the meteorite is not a lunar and Martian meteorite, the source of which planet is unknown, the world is the only one, now the valuation is more than 60 million, the unit price is more than 20,000 yuan per gram, and the future appreciation space is huge.

"There is a general state of mistrust in the domestic market, and many people have completed their purchases through international channels. Distrust is not only because there are too many fake meteorites in China, but also because of the price that has been raised", Rex in the video said that the price of mainland meteorites has risen very quickly, and the competition for rare and good-looking high-end meteorites has become increasingly fierce, rising 10 times in the past two years, while some ordinary meteorites have also risen by about 1 times.

At the end of November 2014, a number of domestic media quoted the Spanish newspaper El Abesai as reporting that the entry of wealthy Chinese people has changed the "ecosystem" of the meteorite trade, not only raising prices, but also exacerbating the trend of counterfeit goods in the meteorite market. Some analysts say that some new buyers only focus on how much the meteorite is worth, and do not care about its scientific value at all.

At noon on February 15, 2013, a meteorite rain landed in the Chelyabinsk region of Russia, injuring more than 1,200 people, but also bringing a new wave of meteorite fever, meteorites were reheated again, and many Chinese online stores used to sell meteorites.

Zhu Jin, director of the Beijing Planetarium, said, "Meteorites as a sample of scientific research, the value should be reflected in scientific research, it is not like gold and jade, the collection value and commercial use are very strange, it is a hyped concept." However, in the meteorite collection boom, Zhu Jin's voice seems weak.

In October 2018, a private house in Komaki City, Aichi Prefecture, Japan was smashed into a crater by a rock-like object, and experts verified that the "culprit" was a 4.5-billion-year-old meteorite.

In 1906, a nickel-iron meteorite was discovered in Sweden and named it Muo

io

alusta。

Seiko Watches has carefully crafted an artifact called the Astro Boy Meteorite Watch, and the dial of this watch is made by slicing this meteorite using high technology. The section of this meteorite has a natural, special texture called the "Vesteden structure", and the pattern presented on the surface is fashionable and simple, which is a special structure formed by cooling every million years when the planet cools, that is, the octahedral crystal structure.

Researchers at the University of Stuttgart in Germany have found a 1,000-year-old meteorite Buddha statue weighing 10 kilograms and about 24 centimeters high. In fact, a Nazi expedition found the Buddha statue as early as 1938. It was found that the Buddha statue was carved from a rare nickel-iron meteorite.

The culture represented is believed to be somewhere between Buddhism and the pre-Buddhist Bon culture, and the Buddha depicted is the King of Bishamen, or the northern King of Dowen, known in Tibet as "Zangbala". The Iron Buddha is the only known humanoid statue carved from meteorite, and its value is immeasurable.

More than 120 impact craters have been discovered on Earth, most of which were formed less than 200 million years ago. In general, larger ones are older. A crater in Sudbury, Ontario, Canada, with a diameter of 145 km. It's about 1.8 billion years old. The only other crater of its age is Fort Freed, South Africa.

Canada has most of the craters left on Earth, although only one is old. A crater in Lake Maniquagan, Quebec, is about 210 million years old, filled with rainwater, and has formed a lake with a diameter of 74 kilometers, and the meteorites that caused the lake should be nearly 3 kilometers in diameter.

The largest surviving crater on Earth comes from a relatively recent period in the history of the solar system. The Baringle crater in the Arizona desert was formed about 30,000 years ago by the impact of an iron meteorite. It is estimated that the iron meteorite has a diameter of 60 meters and a mass of more than 1 million tons.

The largest meteorite in the world that did not explode is much smaller than the ancient object that formed some of the largest craters. The Khobasi Meteorite in Namibia, southwest Africa, weighs 60 tonnes and has a volume of 2.75 × 2.75 × 1 metres. It may have landed on Earth thousands of years ago, but no craters were left behind. The only logical explanation is that it is approaching the Earth at a very small angle, causing it to be much smaller than usual.

The second largest known meteorite weighs 30 tons and, like the heaviest of the top 10 meteorites, is composed mainly of iron. The Ahnigheto or Trent meteorite crashed into Cape York, Greenland, about 10,000 years ago. This eventually became a curiosity for the Eskimos on Cape York, who made the metal head of the harpoon out of meteorite fragments. American Museum of Natural History. The meteorite material that falls on the earth every year adds about 10,000 tons to the earth, and most of the meteorite material is no larger than a grain of sand. Meteorites large enough to produce "fireballs" are rare. Folklore all over the world is full of stories of "rumbling thunderstones" and other wonderful natural phenomena. A number of major meteorite falls have been documented, although it was not until the 19th century that it was widely believed that meteorites came from outside the Earth's atmosphere.

Scientists believe that a giant meteorite that fell to Earth about 66 million years ago caused the extinction of many plants and animals on Earth. The meteorite, estimated to be 10 kilometers in diameter, hit Earth in the late Cretaceous period, which led to the sudden demise of the dinosaurs, giant reptiles that gave way to small mammals in the following Tertiary after ruling the planet for millions of years.

The soil of that age around the world was unusually rich in iridium. This substance is rare on Earth, but it is abundant in meteorites, so iridium in the clay is thought to have been released by this massive meteorite impact.

Giant meteorites can cause the extinction of species in many ways. If it falls into the ocean, it can cause a tsunami, huge tidal waves up to 100 meters high. Some studies have shown that the ocean alluvium is consistent with the passage of the waves at this time.

Impacts can also eject large amounts of material into the atmosphere. This blocks the sun's rays, hinders the growth of plants, and in turn affects the animals that depend on plants. Scientists know that 70% of living things were extinct at that time. At the junction of the Cretaceous and Tertiary periods, a large area of fossilized coal ash was also found, with mineral particles with strong impact characteristics, and small spheres of molten rock. Huge meteorites can create craters up to 40 kilometers deep, enough to penetrate the crustal layers of oceans or continents, causing massive volcanic eruptions.