It is a stone the size of a baby's fist, and when you hold it in your hand, you can feel that it weighs about half a kilogram, and its color is light yellow, and there are very obvious signs of weathering on the surface, but you can also vaguely see that there is a transparent layer of melt shell about a millimeter thick in some parts of the surface.

Although the only remaining part of the melt shell is also somewhat indistinguishable due to weathering, Tang Feng's careful identification can still see the melt flow lines, melt lines, melt pits, melt grooves, cracks and edges and corners formed by directional falls, and can also vaguely distinguish dotted or linear nickel-iron metal sulfides.

That's right, the grayish and pale yellow stone in Tang Feng's hand is a stone meteorite!

Tang Feng had been exposed to the knowledge of extraterrestrial meteorites in college, and at that time, he was very surprised by the price of extraterrestrial meteorites, so he put a lot of effort into studying, so Tang Feng still knew more about meteorites.

Meteorites are fragments from other celestial bodies in the solar system other than Earth, mostly from asteroids located between Mars and Jupiter, and a few from the Moon and Mars, and so far, more than 40,000 meteorite samples have been collected around the world. They can be broadly divided into three main categories: stony meteorites (the main component is silicate), iron meteorites (iron-nickel alloys), and stony-iron meteorites (a mixture of iron and silicate).

As the saying goes, "foreign monks will chant scriptures", and foreign stones are also popular, since the 70s of the last century, the price of meteorites has been almost the same as gold. Subsequently, it continued to appreciate at an annual rate of 30%~50%. To this day, the most common meteorites can be sold for $500~600 per gram, and rare meteorites can reach $3000~6000 per gram. One of the most prominent is a silicified iron meteorite found in Russia's Tunguska region, which has a price tag of $100,000. As early as 2001, Huaxia's "Investor" released information that in the ranking of the unit price of international smuggled goods, meteorites have beaten diamonds, mink fur and ice. Poison, ranked first.

The price of a small meteorite in the market can already be compared to gold, so there is also such a group of people in the market, they are professional meteorite hunters, also called star hunters. Their job is to search for meteorites in the deep mountains and old forests and the Gobi Desert, and sell them at high prices for huge profits. The treasure hunt is full of dangers, but the story of getting rich overnight continues to exert temptation. In 2013, a meteorite fell in downtown Russia, which attracted a lot of attention.

The reason why these "alien stones" are so precious is that scientists believe that meteorites have a lot to do with the origin of life on the earth, so meteorites have great scientific research significance, and another reason is that most of the meteorites are scattered in mountains, forests, deserts and other inaccessible places, and the number of people found is very small. It is the so-called "scarce is expensive", which has caused the price of meteorites to rise day by day.

Among the many meteorites that have been discovered, in terms of value, the highest is the lunar meteorite, followed by the Martian meteorite, and then it can be ranked with other meteorites.

The reason why lunar meteorites are so precious is mainly because of their scarcity, so far, a total of about 40 lunar meteorites have been found in the world, and as for the number of Martian meteorites, there are almost more than 100.

Compared with other meteorites where the price of a gram is hundreds to thousands of dollars, the price of lunar meteorites cannot be said, and it is most appropriate to describe it as priceless and marketable.

Since it was first discovered at the South Pole in 1919 and confirmed to be a lunar meteorite in 1981, the price of this highly prized meteorite has skyrocketed, and once it appears at auction, each occurrence sets a staggering transaction amount. For example, in a 1993 Sotheby's auction, three lunar meteorites the size of seeds brought back from the moon by Soviet spacecraft in 1970 with a total weight of only 0.33 grams were sold for $442,500.

In November 2013, at an auction in China in China, a moon meteorite meteorite numbered "Moon 670" weighing 85 grams was auctioned for 2 million yuan, and in 2014, at an auction in China in China, a lunar meteorite weighing about twice as much as "Moon 670" was auctioned for a sky-high price of 13 million yuan!

A carat is a unit of weighing for a gemstone, and one carat is equal to 0.2 grams. Now the price of pure gold is about 230 yuan per gram, so a carat of gold is about 46 yuan, and a one-carat diamond, a loose diamond is about 20,000 yuan.

How big is a one-carat diamond? It is about 6.5 mm in diameter and 3.9 mm in height. The three lunar meteorites brought back from the moon in 1991 combined for almost 1.5 carats, but they sold for $442,500! It can be seen from this that the value of lunar meteorites is very high, and compared to it, the same volume of gold and diamonds is nothing at all!

What made Tang Feng's heart tremble was that he suddenly found that the meteorite in his hand, which weighed almost half a kilogram, looked like a moon meteorite, and it was also a weathered glass meteorite!

Because in terms of color, the meteorite in Tang Feng's hand is light yellow, and among the lunar meteorites that have been discovered, there is a light yellow color, but the light yellow color is not common in other meteorites; The second is that the thaw shell on the surface of this stony meteorite is transparent, not the black thaw shell of ordinary stony meteorites, which is one of the unique signs of lunar meteorites; As for the third point, after careful observation of this meteorite, Tang Feng found that it has the characteristics of breccia plagioclase, and this feature is one of the important evidences for the identification of lunar meteorites!

A lunar meteorite is a meteoroid that hits the moon, and the rocks are ejected from the moon, captured by the gravitational field of the earth, and fall to the earth. When the moon is hit by a huge impact to form a crater with a diameter of several kilometers, these debris will leave the lunar surface, some of the debris will be recaptured by the moon's gravity and return to the embrace of the moon again, while others will be captured by the earth's gravity because of the acceleration obtained during the impact, and then these debris will often move in a circle around the earth, which is basically hundreds of thousands or even millions of years, and finally fall into the arms of the mother earth under the strong attraction of the mother earth.

However, the number of these fragments that can eventually fall on the surface of the earth is not very large, most of them will be burned up when they pass through the atmosphere, and many of them fall into the ocean, but in any case, as long as the lunar meteorites that fall on the surface of the earth and are discovered, aside from those iron meteorites, as long as they are stony meteorites, almost all have some characteristics of the lunar rock layer, and the most important thing is the characteristics of breccia plagioclase!

It is precisely for this reason that Tang Feng intuitively feels that this meteorite is a lunar meteorite!

At this time, Tang Feng only felt that the meteorite in his hand seemed to weigh a thousand pounds, if this meteorite was really a lunar meteorite, then once such a large piece of lunar meteorite appeared at auction, the auction price would be an incredible sky-high price!