Hotan Kunlun real estate recruitment

Generally speaking, the appreciation of jadeite depends on those aspects. The quality of jadeite is generally judged from five aspects: texture, hardness, transparency, specific gravity and color. The texture of jade refers to the delicate and moist degree of jade. One of the differences between Wang and Shi is that jade is delicate, moist and hard, translucent and shiny as fat; Stone, on the other hand, is rough and dry, lacking luster and opaque. Hardness refers to the ability of jade to resist external forces (such as pressing, engraving and grinding). The higher the hardness, the more difficult it is to process and the better the quality of jade. * w2 @9 a 1 g ".w

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Although the hardness index of jade can be known by detecting its internal crystal structure with instruments, the method of scraping hardness is generally used in operation. The hardness of common jade in China is between 4 and 6 degrees, which is higher than copper and lower than glass. In other words, jade can be carved on copper and glass. "M&A&; k！ E" g' | 1 k v6 q

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People often distinguish gems, jade and colored stones according to their hardness. Generally speaking, the Mohs hardness of gemstones is above 7, such as diamonds, rubies, sapphires and jadeites, but Opal gemstones are an exception, with Mohs hardness of 5.5; The Mohs hardness of high hardness jade is between 6 and 7.5, such as Hetian jade, Nanyang jade and jadeite. The hardness of low-hardness jade is 4-6, such as turquoise and jadeite (the hardness of some serpentine jade is lower, as low as 2.5). The minerals below 4 are generally not called jade, but called colored stones. 0 liter T( ]2 A7 T( C$ {+ b/ Y

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In addition to describing hardness, there is also a hardness standard called compressive hardness, or indentation hardness, that is, absolute hardness, which refers to the ability to resist external impact, and is also called toughness in the jade industry. The highest compressive hardness in nature is black diamond, marked as 10 degree, followed by Hetian jade, with compressive hardness of 9 degrees, jadeite, ruby and sapphire of 8 degrees, diamond, crystal and aquamarine of 7-7.5 degrees and so on. On the other hand, the compressive hardness of Hetian jade is 1000, that of jadeite jade is 500, that of Xiuyu jade is 250, and that of agate is only 5. Hetian jade has such high toughness because its crystal distribution is woven like a blanket, and the intermolecular force is very large. 2 `8 X+？ % U) ]8 P9 T

% O8？ +X" F, m In practice, a jade craftsman usually inspects jade by observing the slag mouth. Generally, he cuts a small piece, breaks it with a small hammer, and observes the fracture, which is glassy compared with strength and toughness. Jade with strong toughness is not easy to break, even if it does, the fracture is uneven; The fracture of glassy jade is called "bright slag" through bright section, which is similar to shell shape. Jade, which is between toughness and glassy, is usually called "bad" and "meat", and its slag mouth is granular, parallel bundle, needle and so on. Through this observation, we can also observe whether jade has cleavage characteristics. If there is cleavage or crack, the jade will break in the direction of cleavage or crack when knocking. 5 p. i# E6 V9 W8 ~) w* j' J，L

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It can be seen that Hetian jade, a kind of jade with excellent toughness, has very strong plasticity during processing. Among the gems with the same Mohs hardness or higher hardness, Hetian jade will never crack when carving, so its texture is delicate, moist and shiny. Of course, toughness and hardness will also be affected by jade impurities, and impurities can also be understood by measuring toughness and hardness. This is a major factor that determines the use of a piece of jade. For example, jade magazine is not strict in making jade mountain seeds and utensils, but it requires pure and uniform jade materials when making jewelry. " ? e: J6 i/ Y% i0 F" s4 J

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The hardness of jade is one of the important criteria for identifying jade, and the luster of gem is also the basic criterion for identifying the authenticity and grade of gem.

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Generally speaking, the luster of gems can be simply divided into "strong light", "burning light", "flash" and "weak light". But light is the strongest brightness, and people must squint. For example, the polished diamond total reflection surface has such brightness; Burning brightness is also very high, dazzling and high-hardness gems generally have burning brightness after polishing; Flash is the brightness of ordinary glass, which is divided into strong flash and weak flash. Jade with high hardness is generally strong flash, while jade with low hardness is weak flash. However, the light intensity of the stone surface with lower hardness is weak after polishing. 7 y9d； @# s！ T 1 G8 N，~

In addition to brightness, luster is also one of the identification characteristics of gems.

B5 Z5 t7 p. ~% C/ v i7 B, ~ 1 a can also be divided into four categories: semi-metallic luster with refractive index between 2.6 and 3, such as goethite; Diamond luster, with refractive index between 1.9-2.6, such as diamond; The refractive index of glass luster is between 1.3- 1.9, such as jadeite; Grease luster, like animal fat, the most famous is the sheep fat white jade in Hetian jade. Every specific gem has a specific refractive index, and it is difficult to keep consistent with it under various conditions such as hardness, density, refractive index and brightness. Therefore, through the identification of these standards, the identity and initial value of gems can be confirmed.

Jade appreciation generally depends on several aspects. The quality of jadeite is generally judged from five aspects: texture, hardness, transparency, specific gravity and color. The texture of jade refers to the delicate and moist degree of jade. One of the differences between Wang and Shi is that jade is delicate, moist and hard, translucent and shiny as fat; Stone, on the other hand, is rough and dry, lacking luster and opaque. Hardness refers to the ability of jade to resist external forces (such as pressing, engraving and grinding). The higher the hardness, the more difficult it is to process and the better the quality of jade. That's all I know. You can go to msgouwu. Look at this on my website. There are many jade ornaments here, which are very beautiful and all have expert appraisal certificates. I bought it here, and I personally feel good.

What is the most important aspect of buying a computer? Games depend on CPU graphics card memory, office depends on it, and graphics processing depends on graphics card. The graphics card looks at the broadband memory, the CPU looks at the core frequency, and the memory looks at the frequency (the fever depends on the timing). The motherboard depends on the power supply, and the power supply depends on the rated power (special needs also depend on the graphics card interface and power). Of course, the hard disk is the best solid state and the array is better.

Jade appreciates your question, whether it is genuine or not, just add pictures or links to see it!

How to buy a house? What are the main aspects? I suggest you consider the following points when buying a house: first, consider the number of your family members and economic conditions to choose the type, type and area of the house; Second, choose the location and surrounding environment of the building; Third, whether the price is reasonable; Fourth, choose lighting, orientation, etc. Of the house. It is best to suggest that you choose a house facing south, with good lighting and ventilation. Fifth, look at the height of the house, supporting facilities, floor area ratio, greening rate, and later property management. Of course, buying a house is different from buying small commodities. You need to be calm and compare, and you will definitely choose a satisfactory house.

The quality of a mobile phone depends on those aspects. Look at the package:

When I took my mobile phone out of the shopping guide, the first thing I saw was the exquisite packaging box. Most of the packaging boxes are printed on coated paper, and the fonts and images are very clear and layered. Most of the knockoffs are imitation single-sided paper, and the workmanship is not good. The fonts and images are rough. But now there are also fake packages, please pay close attention.

IMEI string code:

Every mobile phone has its own unique ID number: IMEI number, and there will be a unified (ID number) IMEI on the outer packaging box, back cover (or battery slot) and mobile phone motherboard. After dialing "*#06#" on the keyboard, the IMEI serial numbers of all mobile phone motherboards are displayed on the mobile phone screen. Take out the battery of the mobile phone and read the IMEI serial number in the white label on the back of the mobile phone. After seeing two IMEI serial numbers, compare the serial numbers on the box of the mobile phone. If they are all unified serial numbers, it proves that this mobile phone is basically a genuine mobile phone. If you want to go further, please continue to verify.

Network access license:

There is a watermark on the genuine mobile phone network access license, and the surface color is uneven, deep and shallow, thick and thin; Shanzhai machines often copy paper, and the surface color has not changed. In the case that it is not easy to distinguish, you can use the money detector to scan the network access card, and the genuine network access card will display a clear red "CMII" pattern. There is a dent in the printing needle. But there is no pattern in the cottage, and even if there is, it is rough and fuzzy. There is no dent in the printing needle.

Mobile phone appearance:

The key parts of every brand-new mobile phone are wrapped in film. Open the package and look carefully, including: screen (inside and outside screen), back cover of mobile phone, camera, flash, etc. , all wrapped in plastic bags.

Mobile phone accessories:

Regular manufacturers' brand-new mobile phones are equipped with a full set of original accessories, usually one battery and one charge, instruction manual, user manual, data cable, charger, earphone, CD and so on. Domestic mobile phones are generally dual-charge and dual-charge. Whether the accessories are well packaged and whether there are traces of being used.

Look at the usage record:

Check carefully whether there are any SMS, phone book, call records, self-compiled records, etc. These records can be deleted manually, but most mobile game records cannot be deleted.

Shell:

The brand-new mobile phone is well packaged, and the head and chassis are completely harmonious. After installing the back cover, there is no seam left, while the refurbished machine generally uses fine imitation shell. Most of them will have the problem that the back cover will not close, which is large and uneven. Simply test with a nail and slide in the gap. If the back cover comes loose, we can't buy this mobile phone.

View dead angle:

The most important thing for a refurbished machine is to look at the dead angle. No matter how good the refurbished machine is, it will also leave a problem that the dead angle cannot be cleaned. Every dead corner in the casing has been carefully checked for dust or other impurities, and every screw has mechanical scars.

smell

Users who have bought electronic products for many times know that they will smell a smell after opening the brand-new packaging box. I don't know if it smells good or bad, but it smells good. This smell is left in the production process of the factory, and the refurbished machine also has a device to accurately imitate this smell, but the current technology is not consistent with the smell left by the original factory.

Select enterprise:

Choose a big company, or a company with good reputation, good reputation, good service and long operation time, and you will feel more at ease when buying.

Matters needing attention

When looking at the packaging, pay attention to the refurbished machine. The refurbished machine also uses the original packaging box and instructions, but the refurbished machine is always refurbished. Although the packaging box uses the original genuine packaging box and instructions, it is an old mobile phone after all, and the packaging box and instructions will have traces of use. But now some "black-hearted" businesses are also selling brand-new packaging boxes and instructions in large quantities, so we should carefully examine them.

What aspects of efficiency does a notebook mainly look at? Memory, graphics card, CPU, hard disk

Hetian jade enjoys stones and Hetian jade is distributed in the northern slope of Kunlun Mountain, which is from shache to Kashgar in Xinjiang, from Hetian to Khotan, and from Qiemo County, with a distance of 1500 km, with 9 producing areas. Hetian jade is mainly composed of tremolite-actinolite, and contains a small amount of diopside, serpentine, graphite, magnets and other minerals, forming different colors such as white, turquoise and black. Most of them are monochromatic jade, and a few have variegated colors. Emerald is translucent and has a greasy luster after polishing.

Hetian jade is sandwiched between rocks at an altitude of 3500 to 5000 meters. After a long period of differentiation and stripping, it split into pieces of different sizes, collapsed on the hillside, and then flowed into the river by rain. When the river dries up in autumn, the jade pieces collected in the river bed are called seed jade, and those mined in the rock stratum are called mountain materials. The earliest Hetian jade has been found from Fu Hao's tomb in Yin Ruins. After the Spring and Autumn Period and the Warring States Period, Hetian jade became the main jade material, collecting seed material, and it was not until the Qing Dynasty that the mountain material was mined. Dayu was made during the Qianlong period of the Qing Dynasty to control the water in Yushan. Sapphire weighs more than 5000 kilograms, which is taken from Maitreya Mountain.

At present, Hetian jade, Shaanxi lantian jade, Henan Nanyang jade, Gansu Jiuquan jade and Liaoning Uranium Rock jade are also called the five famous jade in China.

Supplement: Hetian jade is mainly tremolite, and contains trace minerals such as serpentine, graphite and magnet, forming different colors such as white, turquoise, black and yellow. Most of them are monochromatic jade, and a few have variegated colors. Jade is translucent, greasy and shiny after polishing, and its hardness is 5.5 to 6.4 degrees. Hetian jade is sandwiched between rocks at an altitude of 3,500 to 5,000 meters. After long-term differentiation and decomposition, it decomposes on the hillside and flows into the river after being washed by rain. When the river dries up in autumn, the jade pieces collected in the river bed are called seed jade, and those mined in the rock layer are called mountain materials. The earliest Hetian jade has been found from Fu Hao's tomb in Yin Ruins. After the Spring and Autumn Period and the Warring States Period, Hetian jade gradually became the main jade material, all of which were collected materials, and it was not until the Qing Dynasty that mountain materials were mined.

The economic value evaluation of Hetian jade is based on the purity of color and texture. Its main varieties are: white jade, containing tremolite above 95%, white in color, pure in texture, delicate and shiny, which is an excellent variety in Hetian jade. During the prosperous period of jade-making in Han, Song and Qing dynasties, great attention was paid to the selection of materials, and high-quality white jade was often carved into "heavy objects". Sheep fat white jade, the top grade of white jade, is pure and delicate in texture, containing 99% tremolite, white in color, equivalent to the weight of jade, and has much higher economic value than white jade. Sheep fat white jade was highly respected in Han Dynasty, Song Dynasty and Qing Qianlong period. Qingtian jade has no obvious difference from white jade in texture, but its color is light blue and green. It is the third-class jade in Hetian jade, and its economic value is slightly lower than that of white jade. Sapphire, which is light blue, turquoise and gray in color, is called sapphire, which is rich in reserves and is the main variety of jade collection or mining in past dynasties. Topaz is named as dense wax yellow, chestnut color, okra yellow, yellow flower yellow, egg yolk, etc. Close wax yellow and chestnut color are extremely rare, and their value can be comparable to that of sheep fat white jade. In the Qing Dynasty, due to the homonym of "yellow" and "emperor", it was extremely rare, and its economic value once exceeded that of white jade with sheep fat. Tang jade, which is more common in white jade or plain jade, is called bi-color jade material, which can be used to make "Qiao jade". The nose pot made of Tang jade leather carving seed material can be hollowed out, which is called "covered with gold and silver" and can also be added. Jet, called pure lacquer ink, has dense black spots and is more valuable than other jet varieties. Jasper, pure dark green is the top grade, while those with black spots, black spots or jade ribs are inferior.

Hetian jade can be divided into three types according to the origin: seed material, landscape material and mountain material.

1. Recycled material: Also known as Zieryu, it refers to the jade eroded, washed and transported into the river by primary ore. It is distributed in riverbeds and floodplains on both banks, and jade is on the surface or buried underground. It is characterized by small volume, egg shape and smooth surface. Because of its age, it has been washed, transported and sorted for a long time, and its dross is removed and its essence is retained. Or buried deep in the soil, several different pits, full of the essence of the earth. Therefore, the overall texture of Yu Zi is good, because the food and drink are full and extremely warm. Yu Zi is divided into naked jade seed and leather Yu Zi. Bare jade is generally collected from river water, while leather jade is generally collected from riverbed soil. So the age of leather jade is longer. Some precious jade varieties, such as jujube skin red, black skin, autumn pear yellow, yellow wax skin, sprinkle gold, tiger skin, etc., are all from leather jade.

2. Mountains and rivers: named after artists who collect and cut jade. It refers to the jade formed by the weathering and collapse of primary jade ore and the impact of river water on the middle and upper reaches of the river. The mountain stream is characterized by its proximity to the primary ore, large size, slightly rounded edges and corners, and smooth surface, which is slightly older and younger than Yu Zi.

3. Mountain material: also known as mountain jade, or Gai Baoyu, refers to the primary mine produced on the mountain. The characteristics of mountain materials are different in size, angular and uneven, and the quality is often not as good as that of landscape jade. Strictly speaking, the mountain material has not been baptized by nature and has not absorbed the essence of the universe. It should be called jade, not jade.

From Qin Shihuang, China implemented the emperor system until the Qing Dynasty, and Hetian jade became the imperial jade. Most of the jade articles in the palace are Hetian jade. In particular, the imperial seals are mostly made of jade, most of which are Hetian jade. . .

White jade: white, delicate, moist and slightly transparent, just like sheep fat, so it is called sheep fat white jade; White jade is opaque and has poor luster.

Sapphire and sapphire: dark gray-green to blue-green, opaque; Blue white jade is a transitional type between blue jade and white jade, which is grayish green.

Jasper: Dark green (spinach green) with rough texture. Jasper is not only produced in Xinjiang, but nephrite produced at home and abroad is collectively called jasper.

Jet: a strip mainly composed of dispersed carbon or graphite, which is grayish black or grayish black and white. If it is all black, it is called jet.

Topaz: It is made of white jade infiltrated by limonite, and it is beige to yellow.

Xinjiang jade is one of the traditional jade varieties in China. It occupies a leading position in traditional jade because of its delicate texture, pure and pleasant color, such as "body-like congealing fat, clean and intrinsic, thick and moist, close pulse and loud sound", and Hetian area is also the most famous origin of jade in Xinjiang, so it is also called "Hetian jade". Its texture is hard and delicate. Hetian jade in Xinjiang, also known as nephrite, is mainly composed of actinolite in amphibole minerals. It is found in the snow and ice in mountainous areas and river beds in Xinjiang.

Jade culture is one of the oldest ancient cultures, which can best represent the eastern civilization. Jade represents noble character, beauty and dignity. At the end of June, 2003, 5438+ 10, the selection of "National Jade" in China, which lasted several years, ended. Balin stone in Inner Mongolia was rated as one of the "beautiful stones", and Hetian jade in Xinjiang was also awarded the title of "beautiful jade". It was officially named "National Stone of China" by China Gemstone Association.

Gems are non-renewable, and high-quality raw materials for making gems are very scarce in resources. With more and more exploitation, there will be less and less. The gem making process belongs to the traditional national craft, which is carved by designers and artists by hand. Moreover, each work has its own theme, cultural and artistic characteristics, which is quite collectible. Jade culture has a strong cultural flavor in China, and jade has always been the favorite and collection focus of emperors, princes and wealthy families.

Jade appreciation flashlight Jade appreciation flashlight, should have the requirements:

1, high brightness, good light concentration and strong light transmission.

The most important thing to appreciate jadeite is to look at the texture inside jadeite. The more light gathered, the stronger the effect.

2. Small size.

Jade appreciation is a delicate work. No one will look at jade with a big flashlight, which is not only cumbersome, but also too unprofessional and funny to others.

3, flat head.

The heads of many flashlights are sharp and easy to scratch jade, so it is also an important detail to polish the lamp holder smoothly.

4. Light color

At present, yellow light and white light are commonly used, but white light is used more and more. Because most LEDs are white light, LED flashlights can be made small and have high brightness.

5. Battery

Generally, batteries No.7 and No.5, or lithium batteries of the same size, 18650 lithium battery.

If you like it better, it must be the most popular tank007 tourist jade appreciation flashlight at present. Those who like yellow light, as well as stainless steel models, need to bring a special lampshade for jade appreciation before they can focus nearby.

How to identify a good school? What are the main aspects? See if the teacher is responsible for you and how the school spirit is. Don't just look at the appearance, such as school buildings. It doesn't matter. Look at his teaching quality. You can also see comments about this school on the internet and so on.