Master Xu briefly introduced the composition of the jadeite mine, and introduced the mines on the market as before. Su Tianxin only knew that jadeite was colored, and only then did he know that the main thing to look at the rough stone was to look at the characteristics of the field.

Each jadeite field has its own unique characteristics, the unique characteristics of the field may be able to represent a certain amount of jadeite contained in the situation, although it can not be completely dependent on the characteristics of the field to break the jade, but this is also a judgment point to see the original stone.

The top ten famous mouths of Hpakant belong to the historical pit and are the earliest to be mined. The skin of Hpakant is thin, the skin is mainly gray-white and yellow-white, the crystals are fine, the seed is good, the transparency is high, and the color is sufficient.

The Munachangkou belongs to the Hpakant field, which is one of the important and famous old farms in the field, which has a long mining time, less reserves and relatively low production. The mouth of the wood field is divided into upper, middle, and lower wood. The field mouth is famous for the abundance of uniform color jadeite, and the jadeite rough skin shell of the field mouth is mostly white salt sand skin.

The characteristics of the jadeite rough stone at the mouth of Mu Nachang are: good water, ice species, white and yellow skin, the outer skin appears coarse but the flesh is fine, the imperial green is bright, and the color is positive and thick.

Therefore, many people like to collect the material at the entrance of the wood, because there are more opportunities for the material at the entrance of this field to produce good materials.

And the new factory is messy and dry, there is no skin, the water is good, the bottom is good, and there is white fog. It mainly produces violets and red frites. Generally, there are purple, red and light emerald on a piece of jade, but there are many cracks.

Although it is easier to be excellent, in the case of lines and cracks, it is not as easy to ship as the rough from the mouth of the Hpakant mine.

The top ten mines have their own unique characteristics, and it cannot be said that the rough stone of which mine mouth is necessarily better than others, but if there is a preference, you can focus on the material of some fields, in order to achieve the maximum profit.

Su Tianxin listened very seriously, especially the two elves, who had already made a military order in front of Su Tianxin before, and they had to study hard and make money well, so that they could buy delicious food.

In their eyes, learning jadeite knowledge now is completely linked to making money and buying delicious food.

The students studied seriously, and the teacher who gave the lecture was naturally more confident, not to mention the three of them listening seriously, Su Tianxin and Richard were taking notes seriously, and Master Xu was talking about these things that were almost integrated with his blood and bones.

Master Xu talked about the characteristics of the field, and talked about how to actually look at the stones, in order to be able to talk about it, so that Su Tianxin and they could understand that Master Xu also brought a lot of samples over today.

Because when Su Tianxin and Qiao Muqing came over together, Master Xu and they had already arrived, Su Tianxin didn't notice that Master Xu had brought five or six suitcases today. As soon as you open it, there are stone samples inside, some of which are directly intact of the original stone shell, some of which can be seen by wiping a window with a light, and some of which are cut semi-clear materials, and completely cut materials.

Seeing these things, Su Tianxin knew that Master Xu really took teaching them very seriously.

Originally, what I said before was just to find a master for Su Hai and Richard, and meet in the evening, Su Tianxin was rubbing to listen to the class, but I didn't expect Master Xu to prepare so hard, and Su Tianxin also wanted to learn hard with Master Xu.

It is better to read 10,000 books than to travel 10,000 miles, and just looking for information on the Internet and books to learn is far less clear than a hand-in-hand teacher like Master Xu.