Most meteorites have the same composition as the rocks on the earth, mainly silicate, containing nonmetallic elements such as oxygen, carbon and silicon. It may also contain iron, nickel or other more precious metals.

According to their different compositions, meteorites can be roughly divided into three categories: stone meteorites, iron meteorites and stone-iron meteorites.

Gao Shuang said that in our daily life, we will also be exposed to radioactive elements, but not enough to reach a dangerous level. Elements in meteorites can be found on the earth, and generally speaking, they will not cause harm to human body due to radiation.

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"Some countries have a relatively complete meteorite market, which is sold by the gram, and the price varies greatly." Zhu Jin said that some meteorites cost a few cents or a few dollars a gram, and of course there are also meteorites with high prices.

Gao Shuang said that most meteorites came from asteroids, and some came from the moon and Mars. The age and source of meteorites can be identified by scientific instruments. In terms of composition, iron meteorites are more expensive than stone meteorites, and in terms of rarity, meteorites from Mars will be more expensive.

He said that China has no specific regulations on the sale of meteorites. Meteorite is not produced by people, so it is difficult to judge its cost and value, and it is also difficult to price it specifically.

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