Meteorites refer to debris from other celestial bodies in the solar system other than the Earth. Most of them come from the asteroid belt between Mars and Jupiter in the solar system, and a few come from the moon and Mars or asteroids that have collapsed and disappeared. Stone meteorites are the most common type of meteorite found. It is a general term for meteorites composed mainly or entirely of silicate minerals, especially iron-magnesium silicate. According to the chondrite structure, it is divided into two categories: chondrite and achondrite. Meteorites are stone bodies that cosmic meteors outside of the earth deviate from their original orbits or fall into pieces on the earth. They are natural solids that fall from space to a certain place, and are also called "meteorites." It is a precious and rare physical specimen that humans directly know the stars of the solar system, and is of great collection value. Because most meteorites fall in sparsely populated areas such as oceans, grasses, forests, and mountains, only a few dozen meteorites are discovered and collected each year, and the number is very small.
Stone meteorites consist of silicate minerals such as olivine, pyroxene and a small amount of plagioclase, and also contain a small amount of metallic iron particles, sometimes up to 20 or more. Density 3 to 3.5. Stone meteorites account for 95% of the total meteorites. At 15:00 on March 8, 1976, a meteorite rain that was rare in the world fell within a range of 12 kilometers from east to west and 8 kilometers from north to south in Jilin area, covering a total area of more than 500 square kilometers. There are more than 200 meteorites collected. The largest meteorite No. 1 weighs 1770 kilograms, which is the heaviest single meteorite in the world. On the surface of Jilin meteorite, there are black, black-brown fusion crust and airmarks of varying sizes. The chemical composition is SiO2 accounts for 37.2, MgO2 accounts for 3.19, Fe accounts for 28.43. The main minerals are chrysolite, bronze pyroxene, iron pyrite and pyrite. The secondary minerals include clinopyroxene and plagioclase. Stone meteorites can be divided into two categories according to whether they contain chondrites inside: chondrites and non-chondrites. Chondrites are classified into five chemical groups according to chemical-petrological classification: E, H, L, LL, and C. The E group has the highest iron and nickel metal content, formed in an extremely reducing environment, and its olivine and pyroxene contain almost no iron oxide. Group C has the lowest iron-nickel metal content (or does not contain iron-nickel metal components), formed in a fairly oxidizing environment, and the ratio of iron oxide content in olivine to pyroxene is the highest. The formation environment of the H, L, and LL groups is between the E group and the C group, and its characteristics are also between the E group and the C group. This stone iron meteorite has perfect appearance and obvious characteristics. The glass meteorite is formed at high altitude, high temperature, high pressure and high speed, so it has obvious formation characteristics: high purity inside without impurities, and the whole body is full of dense small bubbles , There is a melted crust on the outside, there are flow lines on the melted crust, and sometimes large airmarks are produced on the outside and under the melted crust。
Stone meteorites have extremely high scientific research value, making countless scientists crazy for them. Except for glass meteorites, meteorites on the earth are almost evenly distributed. They are easy to find in areas where people live, but in uninhabited areas, there are very rare records. The Arctic and Antarctic regions are very easy for people to investigate now. Picking up a meteorite is also logical. According to the latest news from the US Bureau of Scientific Research, the most likely glass meteorite is a huge meteorite or comet nucleus hitting the earth, causing the surface of the earth to melt and splash out of the crater and rapidly cool down. In recent years, a wave of glass meteorite preservation has gradually emerged in China. The ever-expanding collection of glass meteorites, coupled with their very rarity, has made the global quotation of glass meteorites from a few dollars per pound to a huge number comparable to diamonds. In the past three to four years, not only the quotations of glass meteorites have soared, but the domestic glass meteorite preservation market has gradually formed with high collection value。