The stall owner looked at Su Yuan, who was in his early twenties, and was woken up by Xu Kui's slap, and hurriedly introduced: "Yes, the iron sand just mined from the Laoxishui Mine is the most suitable for grass and steel. ”

Su Yuan walked to a few hemp bags and grabbed a handful of iron sand with his hands, in the traditional steelmaking method, there is a kind of frying steel method, first using iron sand to smelt pig iron, and then smelting pig iron, constantly stirring in the process, decarburizing pig iron, depending on the degree of decarbonization, it can be turned into iron or steel.

Grass steel is obtained in this way by using the local iron sand unique in Longquan, because "fried" is homophonic with "grass", and the appearance of the steel is rough and sloppy, so the Longquan dialect is called grass steel, which is one of the best materials for swords.

Shaking his head, the quality is still not good, not even yellow light, how can it be used to create a golden light sword!

Emi Yanagi watched Su Yuan's every move, for the swordsmith, iron ore selection is the first step in the long march of thousands of miles, and it is also the most critical process. Through years of experience, the master judges the quality and density of the ore, which can be described as one in a thousand.

The steel used for the katana is called tamashi, and it is also smelted at a traditional low temperature. If you fold and forge two pieces of red-hot steel 10 times, you will get 1024 layers of steel.

Through folding and forging, impurities and excessive carbon in the steel can be removed, and the elasticity and toughness of the steel can be increased. The more times you forge it, the more uniform the carbon content of the blade will be, the more detailed the iron crystals will be, and the final forging of the blade will reach thousands of layers, giving the sword a strong toughness.

Su Yuan looked at it once, but he didn't even have a piece of yellow light iron ore, shook his head, and led everyone to continue searching. Suddenly remembering something, he turned around and asked Emi Yagyu, "I heard that in the southwestern part of your country, Shimane, the hometown of the gods, rare ores of special steel are produced?"

"Are you talking about the Minerals of the Gods?" said Emi Yagyu respectfully, "Iron sand is produced there. The iron content is the highest, and the impurities of sulfur and phosphorus are very small, which can ensure that the smelted steel and iron will not be destroyed by impurities, and the types are scarce, and only the top swordsmiths deserve to have. ”

Su Yuan pursed his lips, everything is a treasure in the eyes of the little devil, after all, there are many people and few places, and resources are scarce, so he has the opportunity to see the so-called divine ore with his own eyes.

Coming to another stall, Xu Kui grabbed a handful of iron sand, weighed it a few times with his hands, and said: "According to my experience, a good hand is heavy and the surface is shiny, indicating that the iron content is high, and it is good luck to be able to pick out five or six catties in a hemp bag." ”

Su Yuan walked to the sack and looked at the iron sand that flickered with a faint light, most of it was white light, and the difference was nothing more than brightness, which was basically useless.

Flipping down, I finally found two iron sand that emitted yellow light, the weight was indeed slightly heavier and more shiny than the ordinary ones, Xu Kui's experience was still quite pertinent.

After a few times, I have figured out the doorway of the Five Elements Technique, and the white light iron ore can only be used to create the white light sword, and the yellow light ore with better quality has the opportunity to play the yellow light sword, but unfortunately the number is too small, one in a hundred.

Su Yuan frowned, it seems that the efficiency of traditional iron sand is too low, and a sack can't pick out a few materials that can be used, the next step is to build a golden light sword, and it is useless to buy this kind of garbage.

"If the master is not satisfied, there is ore in front of him, and he is dug directly from the mountain, let's go and take a look?"

Su Yuan nodded, and followed Xu Kui to continue walking inside, many people moved large and small ores down from the truck, and many of them were covered with mud, and they couldn't see inside clearly.

Su Yuan was a little excited to see this scene, this is also an alternative gambling stone, but the bet is not jade, but iron, which is a bit interesting.

The market is very lively, many people whisper around the ore, a good iron ore is worth a lot of money in Longquan, and even in short supply, so some people make a fortune by gambling on iron ore, and they also have eyesight.

Su Yuan looked at Xu Kui and Yanagi Emi with eager expressions, and ordered, "You don't have to follow me, you can go around by yourself and meet here in an hour." ”

Xu Kui nodded and left, he was very familiar with it here, it was rare that Su Yuan wanted to forge a sword, it was the best time to learn, hurry up and get a few good mines out, and see the true strength of the master as soon as possible.

Emi Yanagi was also very excited, she came all the way to Longquan to look for clues, Su Yuan watched the two leave, it was more convenient for him to act alone, and he hurriedly began to look for Jinguang Mine.

"This one doesn't work......

"Hey, it's still yellow light, it's worse!"

"Boss, is there anything better?"

Time was pressing, Su Yuan quickly shuttled between the crowd, and knew the general advantages and disadvantages with a sweep of his eyes, more than a dozen stalls ran down, and only found two pieces of iron ore that flashed yellow light, which was better than nothing, and won it at a low price.

"Huh, this is ......."

Just when he was about to be disappointed, Su Yuan's eyes suddenly lit up, and he hurriedly ran to an inconspicuous stall in the corner, it was getting late, it was estimated that the business was not very good, and the stall owner had already begun to prepare to close the stall.

"How much does this cost?"

Su Yuan picked up a strange thing the size of a basin, which was wrapped in a brown shell on the outside, and the weight was not too heavy, and there were many round pits of different shades and grooves of different shapes on it, which looked very ugly.

The stall owner took a look at it, and introduced it while cleaning it up: "This thing is something I picked up from the Laoxi Abandoned Mine, the texture is not very good, take it for two thousand!"

Su Yuan forcibly suppressed the joy in his heart, deliberately frowned, pretended to study for a long time, and seemed to have no intention of asking: "Laoxi Abandoned Mine? I also go there often, why haven't I seen such a strange thing?"

"It's right next to the grove on the south side of the gourd mountain, don't you say it, this kind of thing is rare for me, and it is definitely not good to forge swords, but the collection is quite interesting. ”

Su Yuan got the information he wanted, didn't say a word, paid the money and left, leaving Laoyuan, and couldn't help but say excitedly: "Hahaha, God help me, this is really God help me!"

"You can actually meet a meteorite!"

Meteorites are cosmic meteors that have left their original orbits outside the Earth, or unburned stony, iron, or a mixture of rock-iron that dust fragments are quickly scattered on the surface of the Earth or other planets.

More than 40,000 meteorite samples have been collected worldwide, and the various styles can be roughly divided into three categories: stony meteorites, the main component of which is silicate, iron meteorites and stony-iron meteorites, and iron and silicate mixtures.

The one in front of me is an iron meteorite, which contains 90% iron and 8% nickel. The exterior is covered with a black or brown oxide layer, which is called molten shell.

Large and small round pits are called air seals, and grooves of different shapes are called molten ditches, which are formed by their violent friction and combustion with the atmosphere during the fall.

In Su Yuan's eyes, this meteorite shone with a rich golden light, yes, the golden light shone, shining like gold.

"This Yellow Clay ......"

Su Yuan pinched the soil attached to it with his hand, and it actually flashed with the same golden light, could it be ......