In fact, there are not many jade city stores here, most of them are Hetian jade, Hetian jade, Kowloon is only a little known, only know that it is as famous as jade, since you have come to the jade city, you must always make a survey of the market situation of Hetian jade, which is also conducive to doing a good business for yourself.

There are several Hetian jade businesses here, and the two of them entered a store to take a look, and the shopkeeper greeted him warmly.

Jiulong found that these Hetian jade are mainly white, of course, the color of Hetian jade is very rich, there are white, cyan, gray, light to dark green, yellow to brown, ink, etc.

When the shopkeeper saw that Kowloon was a southerner, he was surprisingly enthusiastic, and took the initiative to introduce the types of Hetian jade.

He first introduced the mountain material: the primary ore form of Hetian jade is generally large, sharp and angular, and the quality is average.

Then there is the mountain water: the mountain ore is broken and rolled into the river, and after a period of time the river water is washed and deposited in the riverbed, the riverbed is exposed after drying up, the surface is relatively rounded, and the quality is between the mountain material and the seed material.

The focus is on the seed material: the mountain material falls into the river, and is formed after a long time of river erosion, and the quality is the best among the three types of Hetian jade.

Skin color: A secondary color that is only found in seeds.

Those who are familiar with Hetian jade know that throwing a magnet in the dry riverbed of the Yulong Kashgar River can absorb a lot of iron powder.

The surrounding area of Hetian itself is a large iron basin, which is very rich in iron, and Hetian jade is loose in jade under the action of flowing water, and cracks are often infiltrated by metal cations, forming the so-called skin color.

He pointed out to Jiulong a kind of skin color, which is a typical sprinkled gold skin, which belongs to the more precious color of Hetian jade.

There is a kind of light white seeds: the surface is smooth and skinless (or very little skin), the whiteness is first-class, there are no obvious defects, and the original seeds with a round shape are called light white seeds, which belong to the relatively open Dongdong, and the quality (especially the whiteness) is one of the best in Hetian jade, and the mutton fat white jade is also out of this category, and the block degree will be very valuable.

He carefully opened a locked cabinet and showed Kowloon a piece of mutton fat white jade.

He said that this thing is very valuable, and its preciousness and scarcity are rare to see in the market.

Now there are "mutton fat jade" hanging everywhere on the Internet, sending some so-called materials that can reach the mutton fat level, and you can compare it yourself to see if it is true or false.

Have you noticed? Mutton fat jade is not just "white", it needs oil, it needs to be moisturized, if you still can't find the feeling, find a piece of mutton fat and you will understand.

Then he took out a black thing called black jade, saying that it was caused by the penetration of carbon elements, and unlike the skin color, the black color of black jade belonged to the color of Qin, which penetrated into the interior and was evenly distributed.

The skin color is on the surface, and the dip is often about a few millimeters.

There is a kind of yellow material: it is tender yellow texture, green, and the national standard identifies it as topaz, but it is not recognized in the circle.

There is also Huangqin material: Dongdong, which used to be the closest to topaz, is Huangqin material, but it is still a yellow-skinned seed material, but the color is dark.

Strictly speaking, sugar jade does not belong to any of the five major colors of Hetian jade (white, green, ink, yellow, blue, here is the national standard), and the background color still belongs to the white jade category (which can be understood as a porcelain fetus).

The selling point of sugar is somewhat similar to that of black jade, which is borrowed from its color, or the peculiar interweaving formed between the color and the bottom, so good sugar is generally a special material, and the price is uncertain, depending on the characteristic situation.

Full sugar, you can see that this waist buckle can hardly see the original white jade base, and the sugar color is uniform and thick.

In the case of the white jade base and the sugar color intertwined with each other, the boss gave it a name called Sugar Sugar, and you can compare it with the whole sugar material.

It is not difficult to judge the quality of Hetian jade, first, pay attention to whether there is a crack: the meaning of the word is to show how bad this is, it is a physical damage, and the crack on the surface is generally not a big problem, but if it is not properly protected, the crack will have the possibility of deep development.

The second is the waterline: the waterline is one of the common flaws in Hetian jade, which is a transparent light-colored band.

The third is cotton dots: the white crystals in the jade, mostly needle-like or flower-like, which are one of the main defects of Hetian jade.

Of course, the pores of Hetian jade are not faulty, it is one of the characteristics of the seed material, Hetian jade under the impact of water flow, the surface of the formation of local osmotic pressure, the jade slightly loose place will occur a small area of cracking, after a long time to form a surface characteristic similar to human pores, the current pores and skin color are the same, can be artificially made.

He said that while the main constituent mineral of Hetian jade is white tremolite, Hetian jade is white.

Due to the Mg content in the chemical composition of Hetian jade, with the homogeneous substitution of Fe for Mg in tremolite molecules, Hetian jade can show different shades of green, and the higher the Fe content, the darker the green of Hetian jade.

When the tremolite in Hetian jade contains fine graphite, it becomes black jade.

The luster of Hetian jade: It is the ability of jade to reflect light, due to the different textures and hardness of various jades, as well as the different degrees of absorption and reflection of light, the luster is also different.

Hetian jade can have a grease luster, waxy luster, or vitreous luster.

The grease luster is very soft, not strong or weak, which makes people look comfortable and moist to the touch.

Generally speaking, the texture of jade is pure, and the luster is good, and the luster is weak if there are many impurities.

Generally, the value of glossy and oily ones is higher, and the value of shiny and dry ones will decrease.

Transparency: Refers to the intensity of light transmitted.

Hetian King is translucent to opaque, the vast majority is slightly transparent, and a very few are translucent.

There are three factors that affect transparency, one is the strength of the light, the second is the thickness of the jade, and the third is the strength of the jade to absorb the light.

Refractive index: The refractive index of Hetian jade is 1.606-1.632 (+0.009, -0.006), because it is a mineral aggregate substance, it is rare to read two values at the same time, and a vague shadow boundary can be seen at 1.60-1.61 in the refractometer by spot measurement.

The density is generally 2.95 (+0.15, —0.05) g/cm³.

The hardness of Hetian jade: Hardness refers to the ability to resist external pressing, carving, and grinding, and is one of the important signs for identifying Hetian jade.

If the hardness is high, the jade has good polishability, good brightness, and can be stored for a long time.

The Mohs hardness of Hetian jade is 6.0-6.5, and there will be certain changes due to different structures, and it is generally said that the hardness of green jade from the same origin is slightly greater than that of white jade. In the past, the hardness of high-grade jade was an important indicator in the division of low-grade and high-grade jade, generally speaking, the hardness of high-grade jade was larger, and the hardness of low-grade jade was smaller.

The Mohs hardness of glass is 5-5.6, and when Hetian jade is carved, the glass will leave obvious scratches, while Hetian jade will not be scratched at all, which is also an important feature of identifying Hetian jade.