Looking at Liu's serious expression, Chen Song and Yang Hao hurriedly nodded in understanding.

Liu glanced at the iron frame and picked up a piece of rough stone that had been cut, with weathered shells on one side, smooth on one side, and rough on the other side.

Pointing to the edge, he said: "Jadeite, its main component mineral is called jadeite, which is an alkaline pyroxene in monoclinic pyroxene, which is a dense aggregate formed by the crisscrossing of countless fine fibrous microcrystallites, with a felt-like structure, because the mining area produced different structures, and the final quality of jadeite is also different." ”

"Jadeite raw materials are generally divided into primary ores and secondary ores, and the main ones we study are secondary ores. ”

Chen Song frowned and asked, "Then how do you distinguish between the two?"

"Primary and secondary ores are clear at a glance and are easy to distinguish. ”

Liu Yiyan said as he picked up a small rough stone with a weathered shell and a rough rough stone with sharp edges and corners, a rough crystal structure, and no weathered shell on the outside, but a slightly smooth one, and put them on the only small table in the house.

Pointing to the rough stone without weathered crust, he said: "This is the primary ore, it is the raw material of jadeite directly mined from the primary deposit, and it has not been moved by natural forces such as earthquakes, volcanic eruptions, wind and rain, and river transport, so it has no weathering on the surface or the degree of weathering is very small, so this kind of rough stone is not weathered with weathered crust, also known as skinless stone." ”

"You see that the jade on it is directly exposed, the shape is irregular, there are many edges and cracks, the overall transparency is poor, the color is light, and the jade is rough, this kind of rare quality is rare, so I don't do too much research!"

Chen Song listened and looked at this piece of jadeite original rough without weathered shell.

It was found to be angular, the crystal structure was rough and loose, and the overall quality did not look very good.

It is indeed recognizable at a glance, because the quality of the jade is so poor!

Liu Yiyan pointed to the small rough stone with a weathered shell next to him and said, "You won't be unfamiliar with this kind of rough stone!"

Chen Song and Yang Hao both looked at each other and smiled.

This thing is dug every day in the mine!

Where it will be unfamiliar, it is already ripe and can not be more ripe!

Yang also smiled at a glance: "This is the secondary ore, which is a pebble or gravel-like jadeite ore body that is excavated from the surface of the primary ore after being transported by natural tumbling, and then deposited at the bottom of the river by weathering, denudation, crushing and water flow. ”

"Because when the primary ore is weathered in nature, the part with poor texture in the ore will be removed in the process of transportation and weathering, and the final part that is retained is often the part with high hardness, uniform texture, compact structure and few cracks, so the secondary ore is not edged or angularity is very inconspicuous, like this is generally produced in the conglomerate of the hillside, modern riverbed or terrace, with obvious weathered crust characteristics. ”

Liu Yan smiled and asked, "You should all be able to distinguish by now!"

"Yes, it's just clear at a glance, it's too obvious!"

The characteristics of these two types of jadeite rough are so obvious that they can be remembered after seeing them once.

Liu Yiyan put the two rough stones back on the iron frame, and took out four small rough stones from the other end of the iron frame.

"Secondary ores are commonly divided into four types: mountain stone, half-mountain and half-water stone, water stone and water turned sand stone. ”

After putting the four small rough stones on the small table, Liu Yan smiled at Chen Song and Yang Hao: "You try to distinguish these four rough stones from the perspective of their names, and see which one they belong to what I just said." ”

Is this a test?

The two didn't dare to slack off, and immediately bent down and looked carefully at the four jade rough stones on the table.

Yang Hao, in particular, was even more engrossed, hoping to leave a good impression on the master in the first question.

Liu looked at the two people who were frowning and constantly identifying the four jade rough stones back and forth with a smile.

After both of them looked at it for a while.

Liu raised his eyebrows at Yang Hao and said, "Yang Hao, you pick a piece and say it first." ”

Yang Hao pointed to a piece of oval rough stone with a smooth appearance, a slightly yellowish brown on the shell, and a jade jade inside could be faintly seen, and said a little nervously: "Master, I think this is a water stone, right?"

"That's right!"

Liu Yiyan nodded.

"The water stone is a jadeite rough stone that is transported by the river to the floodplain for a long distance, deposited and washed by the water flow for a long time, also known as the water skin stone. It is generally ellipsoidal and spherical, with a high degree of roundness, a smooth shell, and the shell is very thin and transparent, and the jade quality inside can be seen locally. Because this kind of rough stone has been transported and sorted by flowing water for a long time, the texture is very delicate and dense, you are right. ”

Liu Yiyan turned his head to Chen Song and smiled: "Little friend, it's up to you to choose." ”

Chen Song thought for a while, pointed to a piece of rough stone with an angular shape and a very thin weathered shell but obvious sandy feeling: "I think this is a mountain stone. ”

Because according to the transformation process from primary ore to secondary ore just mentioned by Liu Yiyan, the name "mountain stone" must mean that the distance of the rough stone is very short, so the weathered crust of the rough stone will be very thin.

"Yes!"

Liu glanced at Chen Song with appreciation.

To put it bluntly, he was not very satisfied with Yang Hao's selection just now.

The most obvious and simple of the four rough stones is the water stone, which can be recognized at a glance, so there is no difficulty at all.

The other three pieces require a certain amount of knowledge to identify, and Yang Hao clearly picked up a cheap one first.

"Mountain stone is the original ore after physical and chemical weathering, divided into fragments of different sizes, remaining in situ or carried by gravity and temporary water flow to the flat slope or valley piled up, because the transport distance is very short, so the surface is only a thin layer of weathered shell, the shape is angular and semi-angular. ”

"Yang Hao, continue until you choose!"

Liu Yiyan was looking forward to Yang Hao's performance.

"Master..... I feel similar to these ..... two pieces, I really can't tell the difference!"

Yang Hao looked at the remaining two gray-white rough stones and couldn't help but scratch his head.

These two rough stones are about the same size and shape, the edges and corners of the rough stones are also rounded, and the sand grains of the weathered crust on the surface look the same, and I don't know which one is which for a while.

Liu Yan shook his head with some disappointment.

"Little friend, you can choose!"

Chen Song looked at these two rough stones that looked similar on the outside, and kept thinking.

Literally, both came out of the mountains and were washed by water, and the general environment made the two similar.

So what is the difference between half-mountain and half-water stone and water turning sand stone?

Liu saw Chen Song thinking at a glance, and he didn't urge.

He even looked at the teenager quietly with a little hope.

"I think this piece is water-to-sand gravel!"

Chen Song pointed to the rough stone that looked relatively thick from the weathered shell.

"Yes!"

Liu Yan looked very excited.

"How did Xiaoyou judge it?"

"I think that the literal understanding is that the weathering degree of water-turned sand and gravel is more serious than that of mid-mountain water-turned stone, so the weathering shell of water-turned sand and gravel should be thicker!"

Chen Song scratched his head a little embarrassed, he didn't know the other differences.

"That's true!"

Liu Yiyan smiled with satisfaction: "These two kinds of rough stones are carried by the water flow, washed by the river water in the water or hit with each other, and lifted into terraced sediments with the downward cutting of the riverbed, and then continue to suffer weathering before they are formed, both are in the flooded zone, so whether it is the sand or other aspects look very similar, they are half like mountain stone, half like water stone jade, but in fact, there is still a certain difference between the two." ”

Liu Yiyan pointed to another piece of rough stone with a relatively thin weathered shell, and said slowly:

"Let's talk about this half-mountain mountain stone first, the characteristics of this kind of rough stone is between the mountain stone and the water stone, although its skin has a layer of sand, but it is different from the sand skin of the mountain stone, its sand layer is relatively thin and clean, but it is not as smooth as the water stone with a certain degree of roundness, but you can still see a little angular. ”

Then he pointed back to the rough stone with a relatively thick weathered shell that Chen Song had just pointed out.

"The reason why this piece is water turned sand and gravel, mainly because the roundness is also good, with a layer of sand-like weathered crust, the shell is hard and thick, the sand particles are obvious, the characteristics are sand without mud, the sand layer is firmly attached, the sand particles are rough and very clean, just like the sand that turns out of the water surface in the torrent, produced in the terraced conglomerate layer or the jade gravel mine in the mountain flood and alluvium, so it is vividly called the water sand. ”

"In terms of weathering, the water turning sand is much more serious than the mid-mountain rock, which is indeed what you say. In addition, water sand is also a special kind of rough stone, it can appear alone, can also be unearthed with mountain stone, but most of the time it is produced together with water stone, so it is closely related to water stone, and even some are formed after long-term weathering, usually the quality of jadeite contained in this kind of rough stone is also very high!

After Yang finished speaking, he turned his head to Yang Hao and asked, "Yang Hao, can you tell now?"

"Master, I will!"

Yang Hao's face turned red with shame.

I have been exploring the jade rough for nearly ten years, and this time I was hit by Chen Song!

I also feel the master's disappointment in myself!

He was very envious of Chen Song's understanding of jadeite.

It would be nice if I could have such an understanding!

As if seeing the thoughts in Yang Hao's heart, Liu glanced comfortingly: "Don't envy others, let alone self-doubt, know yourself, find yourself, persevere, you can be very good!"

"Master, I understand, I will definitely work harder in the future!"

Liu glanced at Yang Hao and sighed inwardly.

After all, this is his only disciple, and he doesn't want to see his mentality collapse!

No matter who it is, with a person like Chen Song who is almost demonic, if you don't correct your mentality as soon as possible, it will inevitably take long to doubt life!

Sometimes, people are so strange, some people try their best to study, but they are just a little bit worse, while some people just need to look a little and think about it, and he will be!

Chen Song is undoubtedly this kind of person!

And although Yang Hao is enough in terms of perseverance and hard work, he is almost a little bit of understanding, and he has to understand everything thoroughly before he can learn!

"In addition, the weathered crust of water-turned sand has a variety of colors because of different environments, mostly white, yellow, blue, and gray, and the sand hair on the weathered crust also has different thicknesses, so we use this to classify the weathered crust of water-to-sand .........., but mainly according to the image characteristics of the weathered shell, such as bayberry shell, lychee shell, emery shell, etc."

"That's all for today!"

Liu glanced at the two teenagers who were listening attentively.

Distinguishing jade pays attention to the combination of theory and practice, and after talking so much at once, it also takes time for the two of them to combine the real thing to fully understand.

"The weathered shells of the various rough stones just mentioned are all sampled on the iron frame over there, and the original stones are also labeled with corresponding names, so you can study and digest them yourself!"

Liu glanced at a three-story iron frame against the window.

"If you don't understand anything, feel free to come to the yard and ask me. ”

Looking at the sun that was about to go down, and remembering that the jade rough stone sent over was still a little unfinished, Liu Yiyan hurriedly walked towards the small courtyard.

"Okay, master!"

"Thank you, Master Liu!"

After looking at Liu Yiyan and walking out of the door.

Chen Song and Yang Hao hurriedly walked to the three-story iron frame.

Pick up the rough stone samples block by piece, look at the names on the labels, slowly feel the characteristics of the different weathered crusts on the rough stones, and study them carefully.........