"Since you all have a good understanding of the weathered shell on the jadeite rough, I won't talk about the weathered shell of the rough stone, which is more fixed in nature. ”

Liu glanced at the table, picked up the jadeite rough with a dark yellow shell and sand grains like salt, and said: "The jadeite rough of ordinary yellow sand skin can have more green inside, but most of the colors are uneven, and sometimes they can also have more elegant color roots, and I will not describe their characteristics." ”

"This yellow salt sand skin is the best of the yellow sand skins, with a yellow salt-like shell, but all the fields have yellow sand skins, so it takes careful observation to identify the specific entrances. ”

Stretched out his hand and pointed to the sand grains above and said: "Like this kind of yellow salt sand skin, as long as the sand grains on the weathered shell are turned evenly enough, there is a strong three-dimensional sense, it is a good product! ”

"Like this kind of yellow skin turned out of the yellow skin sand grains, is the yellow sand skin in the performance of the high-quality goods, after unraveling the white bottom, the color is green and yang, most of the seedlings will be green or yellow green, sometimes there will be green purple Fei three colors, or floating green three colors. ”

After speaking, Liu Yiyan separated the yellow salt sand skin rough stone in his hand, the upper and lower parts that were originally closed, and put it on the table with the cut side up.

This piece of yellow salt sand skin rough stone that was originally put together, after being divided into two by Liu Yiyan, the ice species is shown on both facets, with a large piece of seedling green, and the green is accompanied by a faint purple, giving people a feeling of ice and crystal clear, under the blend of green and purple, the color becomes extremely bright and eye-catching!

Yang Hao raised his head and asked, "Master, what will happen if the sand grains on the weathered shell are chaotic and uneven?"

"If the sand grains on the weathered crust are chaotic and uneven, there is no regular arrangement, such a yellow sand skin has no fog layer, mostly glutinous bottom or bean bottom, if the weathered crust is compact and smooth, most species are poor after unraveling, and once there is no fog under the yellow salt sand skin, the thickness of the sand grains is not distinguished, and the feel is weak, its species will be tender. ”

Yang Hao and the two of them hurriedly nodded and said that they remembered.

The crystal structure of jadeite is delicate and the gap between the crystals is subtle, then its germplasm is older, called "seed old", and the structure is coarse and loose, its germplasm is tender, that is, it is called "young species" or "new species".

The "old" and "tender" of jadeite can be directly displayed on the hardness of the jadeite rough, the older the jadeite rough, the higher its hardness, and the more wear-resistant it is when it is worn and used as a finished product.

Liu Yiyan nodded and said: "The white sand skin and the white salt sand skin are mainly produced from Muna, Mogedie, Mo Xisa and other fields, the sand particles on the white salt sand skin are like salt, and they also belong to the top goods in the white sand skin. Ice jadeite, is the high-grade species of water material existence of the most rough weathered shell characteristics, the most typical origin is the old Muna, medium and high-grade goods appear the most, it is worth mentioning that the white sand skin jadeite inside often has no color, if there is, is also a faint green or purple, but the general transparency is better. ”

"In addition to this, the white salt sand, planted with good old water, will also produce seedlings green, if there is green under the native sand shell, most of them are yang but not yin, and the green color is strong, just like this piece of ......"

Liu glanced at the top half of the jadeite rough stone with a weathered shell as white as table salt, and there were two green bands with strong colors on both facets.

Liu Yiyan pointed to the jadeite rough with two colors of white sand and yellow sand on the weathered shell next to this piece of white salt sand, and said: "But special attention should be paid to this kind of white salt sand skin! This white salt sand skin has two layers of skin, and there is a layer of sand after removing a layer of sand, which is an example of the symbiosis between the secondary sand shell and the primary sand shell, which is yellow on the surface and white after brushing, but it does not affect the common planting of the two and its own quality." ”

Chen Song curiously stretched out his hand and turned over the upper part of the jadeite rough with two colors of white sand and yellow sand on the weathered shell.

I saw that these two cuts both showed ice species, with a very thin green band in the middle, and the rest of the area was colorless and black, but the texture was very uniform and delicate, and the overall quality looked very uniform and the score was exactly the same.

"That's amazing!"

Chen Song praised and asked: "Does the quality of the rough stone mainly depend on the sand particles on the weathered shell, and has nothing to do with the color on the shell?"

"Yes!"

Liu Yiyan nodded and said: "All the rough stones are based on the uniformity of the sand grains, and the size and color of the sand grains on the weathered crust are not important. ”

"Understood, thank you, Master Liu!" Chen Song bowed and said.

Liu Yiyan smiled, picked up the skin has a piece of black and yellow, rust-colored Fei Rough Stone, and said: "This kind of jade rough stone with water turning sand skin, the skin shell is very thin, and the internal quality is also good, but high-grade materials can be produced, the key is also to see whether the sand is turned evenly, mostly for the old stone species, the shell color is black, yellow, gray, but the sand grains are generally not very good, because the production of this kind of water sand is more messy, the bottom and the water are general, the main distinguishing point is whether there is rust on the skin, the representative is the Pingpi water sand of Mamuwan and Huika. ”

Separate the materials in your hands, take half of each in your hand, and see that there is no trace of color on the rough stone, although the overall texture is also very delicate, but it gives people a dull feeling.

After both of them saw clearly, Liu Yan shone half of it against the light.

Sunlight shines directly through the rusty, weathered crust and into a third of the inside.

"The skin of this piece of water and sand is very thin, and it is completely possible to use light to shine through the skin to see if there is color inside. ”

Liu Yiyan closed the rough card stone in his hand and put it back on the table.

"Master, how is the rust on this rough stone formed?"

Yang Hao asked, pointing to the rust on the rough stone of Huika

"After weathering, the primary ore of jadeite is affected by the change of iron content in itself and the surrounding environment, and forms impregnation of the coarse sand shell, most of which are rust-colored, and a few are yellow-black, yellow-gray, brownish-yellow and black-brown. ”

Liu Yiyan carefully explained: "It can appear on different colors of sand shells, and the rust-colored color of the skin is patches or strands, and the width of each strip is unequal, some are flaky, and some are lumpy. ”

"But it's so gray, and it doesn't look good when it's made!"

Yang Hao looked puzzled.

The bottom of this thing is so gray, it must not look good when it is made, and the value is not high, such rough stones are discarded at will on the mine, and there is no difference from ordinary stones.

"Most of this kind of rough stone is the bottom ash, if there is high green in it, you can completely overcome its bottom ash problem, you can overcome and cover the gray bottom, you can't see the gray feeling at all, you look at this piece ......"

Liu Yanyan directly opened a piece of jade rough on the table, which also had a piece of black and yellow, rust-colored color.

On the facet of the rough stone, you can see several strong green bands, but the areas without color are gray and not boring.

The green strip on it looks like an independent individual, and it seems to float on a gray background, which is not affected by the gray background, but is also set off by the gray background to make the color more intense.

Liu Yiyan sighed: "This kind of material is not afraid of the bottom ash at all, it is only afraid of colorless, once it is colored, the color must be green and watery, especially the jadeite rough produced in Dongguo Changkou in the old field area, the color is more prominent!"

"Let's focus on talking to you about Black Usha, this is the most common jade rough we encounter, and it is also the most abundant, almost all the fields have the output of Black Usha!"

Yang Hao frowned and asked, "There are so many fields, and the output is still so large, how can we distinguish them?"

Liu Yiyan smiled: "It's also very simple, generally according to the size of its sand grains is divided into three categories: coarse, medium and fine, the coarse is mostly seen as the coarse bean bottom, and the fine one is mostly seen as the fine bean bottom, but its green and yellow flavor is enough, only the middle one has a waxy bottom, this feature is more common in the rough stone produced by Mohan and Nanqi Changkou, after cutting, some see the positive color and some see the color bias, there is a white cat stool taste, some are green and blue, and even the blue taste is too much. ”

Liu stopped at a glance, glanced at the rough stones on the table, and opened four of the jade rough stones with a layer of wax shells on the surface, before saying: "The black sand from the four fields of Hpakant, Houjiang, Mohan and Nanqi all have wax shells, and it is rare for the black sand from other fields to have wax shells. ”

Picked up two of the original stones that had just been opened and said: "Typical, it is produced in the Houjiang field area and the Mowan base field area, the black sand produced in these two fields are slightly gray, also known as gray black sand, the material is mostly small pieces, this kind of material is relatively easy to solve, it belongs to judging how many colors are contained in the material, because the wax shell is covered by sand, it is not easy to identify, we must be good at finding the difference." ”

"Uh...... Master, this seems to be difficult, it is easy to distinguish between ordinary black black sand materials, as long as you see if there is a wax shell, but the materials of the four fields you mentioned are each wrapped in a wax shell. ”

Yang Hao looked at these pieces, and the wax shells on the surface were almost the same rough stones, which was a headache.

"Is it based on the color of the wax shell?"

Chen Song looked at these rough stones, feeling that the color on their surfaces was still subtle and a little different, and couldn't help asking.

"Clever! is to look at the chromatic difference of the color to distinguish. ”

Liu Yiyan nodded and praised: "The outside of the rough stone looks as black as coal, and the skin is also covered with a layer of black wax shell of the rough stone, we directly call it black wax shell, this kind of rough stone is the easiest to sell high, but also the characteristics of the shell of the existence of high-color jadeite, as long as it is black and shiny, it is water and color, easy to produce imperial green, and the best quality is the black black sand produced in Hpakant and Nanqichangkou." ”

Black wax shell out of imperial green?

Chen Song and Yang Hao's faces couldn't help but froze.

No wonder!

I remembered that in the small vein before, around the remaining half of the dragon stone jadeite rough that appeared, the imperial green jadeite rough that was dug up was not the black wax shell?

Yang Hao quickly stretched out his hand and turned over a piece of rough stone on the table with a black skin and a layer of wax shell.

Immediately, I saw that in the facets on both sides of the rough stone, there was a uniform thick green without a trace of impurities, and the germplasm of the whole rough stone was delicate and lush, crystal clear.

Under the illumination of the sun's rays, the two green clouds above, like turquoise rivers, are constantly swaying back and forth, containing agility!

"It's true!"

Chen Song and Yang Hao glanced at each other excitedly.

It seems that the jadeite rough with a black wax shell is a really good thing!