How to distinguish between good and bad Hetian jade and Nanyang jade?

1. The soft jade usually seen are white jade, greenish white jade, green jade, jasper, nephrite, topaz, sugar jade, ciu jade, dosan jade and playful color jade.

1. There are white jade in sheep's fat white, pear white, snow white, ivory white, fish maw white, fish bone white, brown rice white, chicken bone white, etc., and sheep's fat white is the best in terms of fineness and purity.

2 . Green jade and green and white jade, green in our country has "blue", "black" different concepts, and here the green is more ambiguous color, non-gray, non-green and non-green, in fact, is not clear fresh light green. White and green, green and white, that is, green jade, between green jade and white jade, is called green and white jade. There is no standard boundary between green and white jade and white jade and green jade, which are determined by the naked eye.

3. Jasper refers to the green or dark green color of jade, which is easier to distinguish.

4. Jade is gray-black and black. Often appear uneven, cloudy or pure ink, the form of dark cloud pieces, light ink light, gold sable maid, beauty hair, pure black. The more precious ones are pure lacquer black, like the black light of black leather boots. Ink jade, also known as jade, the Department of green jade in the black impurities caused by, sometimes in the green jade on the appearance of ink jade, sometimes in the ink jade on the appearance of green jade.

5. Topaz yellow, beige, beeswax yellow, chestnut yellow, autumn chrysanthemum yellow, yellow flower yellow, egg yellow, beige yellow, yellow yellow, yellow yellow and so on.

6. Sugar jade country color like brown sugar and named, all due to iron oxide, sugar jade with the same ink jade can appear on the green jade. Most of them are purple red or brownish red, and the positive red color is rare.

7. Dushan Jade, named for its origin in Dushan, Henan Province, is mainly characterized by its multicolor, with blue, green, yellow, white, black and brown colors appearing on a piece of jade at the same time, and its hardness reaches 7 degrees individually.

8. Cui Jade is composed mainly of serpentine minerals, which are water-bearing magnesium silicates that are assembled into a mass, with a small amount of calcite, tremolite, chlorite, and other minerals present in the stone. The hardness is 2.5-4 degrees, with an individual of 5.5 degrees. The colors are white, yellow, pink, light green, emerald green, black green, etc. It is mainly for factories to do jade carving processing. There are rich deposits in Liaoning, Gansu, Guangdong, Xinjiang and Taiwan in China.

Two, hard jade that jadeite jade, is red jadeite green cui meaning. China's ancient books recorded jadeite is not today's jadeite.

Corundum is a sodium-aluminum silicate minerals, hardness 6.5 - 7 degrees, the chemical composition of pure jade colorless or white, when the composition contains metal pigment ions, green, emerald green, yellow-green, blue-green, green, brown, red, orange, violet, purple, pink and other colors, green, green called Jade, brown, red, called Fei.

Jadeite jade due to the natural formation of natural ores, it must have natural natural beauty, never get tired of seeing, and there are stone lines, crystals and flaws exist. The best of the green jadeite is the glassy high green and brilliant green colors.

In the identification of jadeite jade true or false, good or bad, must be flexible to use practical experience, sloppy. To master the color and texture of jadeite jade, to combine the artifacts of the processing technology and many other factors points, in order to judge correctly.

The world-famous jadeite is produced in the Udon River Basin in Myanmar. According to the history of the Qing Dynasty, the jadeite produced in Burma was imported into China, gathered in Tengchong, Yunnan Province, Dali and other places, and then transferred to the mainland. From the beginning of the Qing Dynasty it still exists today. Because jadeite is more expensive and scarce, so fake jadeite gradually appeared. In the Qing Dynasty material stone jadeite and choke color jadeite is more common.

The material stone jadeite is ceramic or glass as raw material, melted at high temperature, plus coloring agent (green) cast.

Choke color jadeite is to use the lower grade of jade or colorless jadeite in the color of the fake. In recent years, due to scientific advances, choking color jadeite has reached the point of false. Choke color jadeite is the use of chromium salts, nickel salts chemicals as coloring agents, by soaking, heating, acidification treatment, so that colorless jadeite into a beautiful jadeite. But the natural jadeite is chromium ions into the hard work mineral crystals composed of natural color, and choke color jadeite is attached to the appearance and fissures, it is afraid of acid, alkali, afraid of sunlight, not resistant.

Third, the authenticity of nephrite identification.

Most of the nephrite is instrumental ornaments, leaving a large number of decorations and age characteristics in kind, physical changes (color) and so on. In the identification of genuine and fake artifacts at the same time, it is necessary to fully understand the characteristics of the era, the shape of the vessel, knife work, changes in decoration, etc..

At present, there are five kinds of fakes more common in the society:

1. old jade new carving.

2. New jade, new carving.

The identification of the above two kinds of fakes is mainly the knife work of the carving is relatively rough, irregular, varying depths, there is no era of style, there is no artistic beauty, there is no ancient flavor. And the real thing is very different, it is knife carving regular, symmetrical, reasonable, do not leave a tail, flawless, the more you look at the mood more comfortable. 3. die-casting.

The so-called die-casting, that is, the jade ore is mixed and crushed, melted at high temperatures and cast in a specific mold, like a factory casting workpiece. There is also a stamping, that is, the ore is mixed into powder, with chemical glue and coloring agent or part of the jadeite powder mixing stamped out of the product. This new product is more beautiful, generous, the cost is relatively high, the city's major shopping centers are sold.

4. sets of material. (glass products)

With glass ore melted with coloring agent casting.

It is characterized by intolerance, bubbles, no jade grain, more than two or three times can be identified.

5. Plastic.

With modern plastics plus coloring agent temperature die casting, and then artificially polished and become. It is characterized by no hardness, light specific gravity, elasticity, not durable, with a pin, iron nail scratching with grain.

Jade jewelry identification two

Identification of jade jewelry, should be from the hardness, transparency, color, luster and the presence or absence of spots in several ways to see. Real jade is very hard and wear-resistant, crystal clear, pure color, luster. If you can see that there are cracks, cotton fiber-like cotton lines or dark wounds inside the jade, it is inferior jade. Where the fake jade stone, the surface has wrinkles, internal bubbles, light weight, hardness is small, and the sound is crisp when knocked against each other.

Agate identification method

Agate is rare and precious things, the market is also a lot of fakes, most of which are made of refined turpentine with powdered glass. To identify the authenticity, it must be placed in the palm of the rubbing some of its color, its shape, its odor is unchanged that is the real thing. However, some people believe that the rubbing, easy to heat is genuine, this is a misunderstanding, unreliable.

Gemstone eye identification method

Gemstones can be divided into two categories: natural gemstones and man-made gemstones, we are choosing gemstone jewelry, how to use the naked eye to identify it? Natural gemstones are generally soft and natural in color, the colors are sometimes very mixed, several kinds of **** in a gem body, there are patterns but irregular, but very delicate. With the naked eye to a strong light to see the gemstone, or with more than five times the magnifying glass to look closely, sometimes visible inside the gemstone such as cotton wool, net or tree root-like inclusions and small cracks, occasionally visible obvious flat growth lines. Some gemstones are cool and slippery to the touch, and appear moist like they have been dipped in oil. Good stones have a "cat's eye" and "starburst" effect after grinding, i.e., there is a white line in the stone that resembles a white line in a cat's eye in bright daylight; "starburst" is the result of turning the stone in sunlight and refracting the light into a white line. The "starlight" effect occurs when the gemstone is turned in the sunlight, and the refracted light sparkles like the wink of a star at night in the moonlight. Artificial gemstones are generally bright, even and pure in color. After polishing, the luster is dazzling, the color of the artificial consciousness is strong, due to the addition of certain rare earth elements, there are monochromatic, such as black, red, yellow, etc.; there are also composite colors, such as rose red, purple sauce. But will never appear phenomenon natural gemstone several colors *** in the body of the gem as the phenomenon. In addition, some of the gemstones in the more obvious round small bubbles and synthetic growth of sub-products traces; growth line is more obvious linear; larger particles; the same color specification number of more; more hard, generally in the Mohs six or more, with a knife carving immobile, on the contrary, these stones can be scratched out in the glass to the trace.

True and false gemstone identification method

In daylight with a light silver pot or white satin as a liner, put the gemstone on the liner from the distance of the body of about five inches high, so that daylight irradiation, if the light penetrated through the gemstone in the liner presents a Venusian silver wing look, can be concluded that it is genuine. If it is a fake gemstone, the lining will show a black shadow, if the gemstone into the mouth for a moment, after the mouth full of Jin, not only do not feel dry mouth, but full of cool, and the gemstone itself and become hot, then, it can also be concluded that this is the real thing.

Emerald gem authentication method

With a bowl full of water, put the gem into the bowl, can make the whole bowl appeared faint green, is the real emerald gemstone; or the authenticity of the gemstone into a copper pot, surrounded by paper, with a fire to ignite the white paper, if you can make the fire into a green, is the real emerald gemstone; or to prepare a pot of red-hot charcoal, the authenticity of the gemstone into the charcoal, charcoal fragrant If the fire turns green, it is a real emerald gemstone; or prepare a pot of red-hot charcoal and put the gemstone to be identified into the charcoal.

Jade Pu identification method

Whenever people see a piece of jade Pu (stone containing jade), often unable to identify whether it contains jade, which is really a pity. In fact, the identification method is very simple, where the stone contains hidden jade, if the stone at night to the light to see, if the stone within the light issued, like the rising sun's color of light, then, it must have a beautiful jade. The opposite is not true.

Diamond identification method

The real diamond, in the dark place issued burning green light, like sparks on the wire. If it is a fake diamond, can only emit a small amount of white light, or even do not shine. Even if luminous, also seems very obscure, no glittering phenomenon. In addition, the hardness of diamond is the largest, respectively, with the real and fake diamonds cut against each other, the nature of the immediate obvious difference. The country has found all kinds of jade **** there are 121 kinds, including: soft jade, hard jade and opal 9 kinds. Dosan jade and other jade 39 kinds, seal stone 17 kinds, quartzite jade 15 kinds, serpentine jade 18 kinds, colored stone 23 kinds.

1. Nephrite, jadeite and opal

Nephrite: Hetian Jade is a soft jade produced in Xinjiang, which is a precious jade in China, famous both at home and abroad, and its carvings are well received in domestic and foreign markets, and it is the main variety developed in Xinjiang at present. Nephrite is found in Sichuan, Liaoning and Jiangsu

Hard Jade: Very little gem-quality hard jade is found in China.

Opal: mainly refers to opal, as opal is mainly composed of opal. High-quality opal with color-changing effect, used as raw material for jewelry, has not yet been found in China. Yunnan, Shaanxi, Jiangsu and other provinces (districts) are ordinary opal, is a low-grade jade material. The common opal produced in Yunnan has bad processing effect and is fragile, so it can only be processed for some jewelry and small crafts.

2. Dushan Jade

Dushan Jade: produced in Henan Nanyang Dushan and named, quartz jade. The texture is fine and the color is bright. Sometimes more than 1,000Kg of colorful jade material can be harvested, creating conditions for the production of giant carvings.

Plum Blossom Jade: Produced in Henan Province, it is used in the production of jade bracelets, birds and flowers, utensils and other crafts.

Colorful Jade (Nine Dragons Wall): produced in Fujian, known as early as the Ming and Qing Dynasties, the jade is colorful and striving for beauty, with abundant resources and good mining conditions.

Rosebud Terrazzo (Peach Blossom Jade, Beijing Powder Cui): mainly produced in Hunan, Sichuan, Qinghai, Beijing, Jiangsu and other places, it is a better raw material for jade carving. Hunan produces stone lions, elephants, as well as flowers, birds, fish, insects, lifelike. The beasts carved from it in Sichuan, especially the door lions carved from it, had been a popular item snapped up by people at home and abroad. Beijing due to the reserves are decreasing year by year, is currently in sporadic mining. Qinghai has not yet specialized in mining, only in the mining of manganese ore, a small amount of incidental mining. Jiangsu has not been exploited so far.

Turquoise: mainly produced in Hubei, Shaanxi, Anhui, Qinghai, Xinjiang, in Jiangsu, Hebei, Yunnan, Sichuan, Gansu, Henan and other small output.

Malachite: mainly produced in Hubei, Guangdong, Yunnan, Xinjiang, in Henan, Jiangsu, Sichuan also has output. Hubei malachite color band clear, superior quality, but now rare.

Fluorite: mainly produced in Inner Mongolia, Zhejiang, Liaoning and other about 16 provinces (autonomous regions), Inner Mongolia fluorite resources, ranking first in the country, green, purple and yellow, colorless. Fluorite is mainly used for carving decorations, displays, mostly used as a substitute for other jade, more used as ornamental stones and mineral specimens.

3. Seal stone

Chicken blood stone: mainly produced in Inner Mongolia Bahrain Bahrain chicken blood stone and Zhejiang Changhua Changhua chicken blood stone.

Leaf wax stone: mainly produced in Zhejiang Qingtian Qingtian stone, Fujian Shoushan Shoushan stone and Jiangsu Liyang stone.

Balin Stone, Changhua Stone, Qingtian Stone, Shoushan Stone and Changbai Jade (Kaolinite) are the "Five Great Seal Stones" of China. In addition, Guanglv Jade (sericite), Liyang Stone, Shangluo Cuiyu (white mica), Pingtang Flower Stone, Huangling Jade, Dongxing Stone, and Purple Robe Jade Belt Stone are all ideal materials for carving seals.

Jade is an important part of rock and mineral resources, and other useful minerals and rocks, as is the composition of the earth's crust of the various elements and their compounds in the course of a long geological history formed by geological action. It can form independent deposits, but also in the form of associated with other mineral resources at the same time **** exist. Among the minerals and rocks in nature, there are a great variety of materials that can be used as jade, about 200 kinds of materials, of which the major and particularly precious ones account for one tenth. These minerals and rocks formed by a variety of geological conditions, but according to the cause of its no more than three major types, including the formation of endogenous mineral action accounted for the vast majority of the formation of exogenous mineral action, followed by a small number of metamorphic mineralization action formed.

I, the concept of gemstone

Broad gemstone is a general reference to all suitable for faceting and carving into fine jewelry and decorative handicrafts of all kinds of raw materials. Including a variety of natural gemstones, artificial gemstones, organic and inorganic gemstones, a variety of jade, colored stones and so on. The narrow meaning of gemstones is determined from the geological cause and value factors of gemstones or jade itself. It refers to the formation of geological action with excellent arts and crafts characteristics and rare, durable, high value can be used to process into a variety of fine jewelry and precious handicrafts of minerals, rocks or paleontological remains of the general term.

Gemstones, refers to the natural world formed by geological action, given to the scarce, extremely rare, magnificent and colorful, hard and durable, can be used for people to make fine jewelry and handicrafts, etc. Mineral monocrystals or a part of it. Most of them wei crystallized single element (such as diamond - diamond) or compounds (such as corundum - ruby, sapphire, etc.)

Jade, refers to the natural world formed by the geological action of the geological fine, color and lustre of the clean and moist, tough and wear-resistant, in a dense It is a general term for transparent or opaque minerals or rocks that are produced in the form of lumps. When faceted, jade shows a fine, soft, clean, solid and greasy polished surface, which is different from that of gemstones in its brilliance and crystalline splendor. Such as nephrite, monazite, plum blossom jade and so on. After processing, the raw materials of precious stones are transformed into products with important artistic value, historical value, scientific value and economic value. In addition to a small number of national treasures for the country's permanent collection, the vast majority of the products go into the market and become precious stone commodities, such as various kinds of gemstone jewelry, jade, etc.

1.2 Evaluation Principles of Jade

Jade and its products are used to beautify and decorate people's spiritual and cultural life, therefore, jade must be characterized by values such as beauty, durability and rarity.

(1) Texture This is the most important criterion for evaluating the quality of jade. It includes crystallization, solubility, cracks, impurities and so on. The texture of jade is required to be delicate, dense, soft and moist. Fine texture means that the mineral particles are less than 0.05mm, such as jade even less than 0.01mm, if the naked eye can see the minerals, the texture is rough, it can only be a low-grade jade.

(2) Color Color is an important criterion for evaluating the quality of jade. The color or hue should be positive, and the pure color should be soft and bright after being varnished, especially paying attention to whether there is "tricky color" or not. The color should be new and beautiful, bright and not dull after polishing. For example, jadeite, narrowly defined as green, the best is emerald green, or both red and green and purple, the market called "Fuk Luk Shou" the price is very high, if it is white without green, the value is much lower. Another example of nephrite, the most high-grade for the white nephrite, the value is very high.

(3) The block size is generally calculated by kilograms, and special precious varieties, such as jadeite in the "gemstone green", the quality of which is like a high-quality gemstone, can also be calculated by grams or carats. Since jade is mainly used as handicrafts, the larger the block size, the better. Good jade generally requires more than 0.5kg, low-grade jade requires more than 2kg, and the extremely precious ones only need to reach the block size to make a ring face.

(4) Transparency Generally speaking, the transparency requirement of jade is low, and many jades are translucent or opaque. Many jade stones are semi-transparent or opaque. For example, nephrite is translucent to slightly transparent, and even opaque. However, relatively speaking, the higher the transparency of jade, the higher the value. To see whether a piece of jade can be used, in addition to the above principles, it is also necessary to consider whether the luster is bright, whether there is porcelain, whether the hardness is greater than 4, and whether there are any special structures and color bands, patterns, etc. The most important thing to consider is the fineness of the texture. Delicate texture is the most important evaluation principle. China's ancient identification of jade "the first virtue and the second charm", virtue refers to the texture, charm refers to the color.

The above mentioned jades are all natural. As the quantity of high-quality natural jade is small and the price is expensive, people are prompted to use modern technology and techniques to produce man-made products. If natural crystals are scarce and expensive, the physical and chemical properties of synthetic products are the same as those of natural products and their quality is better than that of natural products. However, due to batch production, the price is only 1% or less of natural products. This makes recognizing natural jade and artificial jade a very important task.

The general characteristics of jade

The characteristics of jade, the breakdown of the content is quite broad, and now introduces the main characteristics of its several aspects.

2.1 Color

Jade generally has a beautiful color. Color is one of the important factors determining the precious value of certain jade. Jade minerals are generally characterized by brilliant and eye-catching colors such as red, bright red, blue, emerald green and golden yellow. The intensity of the color tone is also extremely important, but depends on the specific circumstances, for some jade, "coquettish color" ("playful color") is also very important, for example, gray-white agate does not look good, but there are irregularities in its withered yellow, the clever use of its faceted agate Plate a pair of lifelike shrimp, then doubled in value.

2.2 Transparency

Transparency relates to the quality of jade, affecting the value of handicrafts. The more transparent the jade, the more valuable it is.

2.3 Hardness

The hardness of jade is not only an important factor in measuring its preciousness, but also an important basis for the identification and processing of jade. Different hardness of jade has different processing means and technical requirements. Jade should be above 4 degrees.

2.4 Brittleness and Toughness

Brittleness refers to the manifestation of the intrinsic bonding ability of jade, and is also a manifestation of the magnitude of resistance to external pressure, and is therefore independent of hardness. The vast majority of minerals that can be used as gemstones are very brittle, as is diamond. Toughness usually refers to the inherent bonding ability of jade. For example, jadeite and nephrite are tough because their constituent minerals are tightly interwoven in microscopic fibers, so they have great resistance to external pressures or fracture forces. On the contrary, dongling stone is composed of fine-grained quartz and mica small pieces, so brittle and poor toughness.

2.5 Flaws

People often hope that "jade is flawless", but in fact this is almost impossible. The impurities that can be observed in jade (points, lines, spots, etc.) are called flaws, including "dirty", "sheep", "inclusions" and so on. "Dirty" is the jade minerals in the formation process of impurities mixed into the silk lines, spots or plaques, of which the most harmful to the black; "Mian" refers to the jade minerals and fissures in the subtle arrangement of lines or irregular fibrous phenomenon. The existence of flaws affects the value of jade, but it is also one of the important features for identifying natural and artificial jade. At the same time, some of the flaws can also be utilized to carve into "playful colors".

The identification of jade three

The following are some common methods for identifying genuine and fake jade:

1, water identification method

A drop of water will be dripped on the jade, and if it becomes dewdrops, it will not be dispersed for a long time, which is a genuine jade.

2. Hand Touching Method

If it is real jade, there is a cold and lubricating feeling when you touch it with your hand.

3, observation method

The jade will be observed against the light, the color is transparent, green evenly distributed is real jade.

4, tongue identification method

The tongue licking real jade has astringent feeling, while the fake jade is not.

In addition, you can also use a magnifying glass to observe, mainly to see whether there are cracks, cracks of its value greatly reduced.

Looking into the sunlight, there are some cloudy things in the jade, a mass of them, like cotton wool.

Jade is very hard, like diamond, so it can be scratched on glass.

Jade is cool, put a hair on the jade, with a lighter to burn, stick to the jade hair burning constantly.

Identify the use of stone powder fake jade approach, you can put the jade in the power of a larger light bulb for 1-2 minutes, and then use your hand to test the temperature of the jade, real jade heat dissipation is good, the hand touched with the feeling of ice-cold, and with the stone powder pressed and made of heat dissipation is poor, the hand touched with the feeling of hot hands. Real jade in the spotlight, can reflect the stone in the grain, artificial can not produce this effect.

There are six criteria for identifying the quality of jade, namely, "color, translucency, uniformity, shape, knocking, and illumination".

(1) Color

Jade is best in green, and the value of red and purple jade is only 1/5 of that of green jade; if jade contains red, purple, green and white, it is known as "Fortune, Longevity and Happiness"; if it contains only red, green and white, it is known as "Fortune, Longevity and Happiness". Fortune and Longevity". Those with dull, slightly yellowish color are inferior. If it is a monochrome jade, the one with even color is better.

(2) Transparent

Transparent and crystalline like glass, without dirty spots, and without chaffing or astringency is the top grade. Translucent and opaque jade are called intermediate and ordinary jade respectively. During and before the Qing Dynasty, jade with red, green and white colors was called jadeite jade. In modern times, Jadeite Jade generally refers to jade that is generally transparent. Currently, jadeite jade is transparent with a greenish color.

(3) Uniformity

The color and luster of jade is important to be uniform, although it contains white and green, but the color and luster are not uniform, the value is very low.

(4) Shape

The shape of jade can be processed into different styles according to different aesthetic requirements, without any special standard. Generally speaking, the bigger the jade, the better.

(5) Knocking

Jade often has fractures and cut lines, which are generally not easy to observe. If you use a metal rod to knock on it, or gently throw the jade on the countertop, you can identify the existence of cracks from the clarity of the sound. The clearer the sound, the better.

(6) Illumination

If there are any black spots or flaws in jade that are not easy to be detected by the naked eye, you will be able to see them clearly if you look at them with a 10x magnifying glass.

The quality of jade can be categorized into 10 grades, each of which can be subdivided into three grades: upper, middle and lower. Among them, white jade is the lowest in value regardless of its color and transparency.

Natural jade is characterized by a slightly lighter color without the light blue (commonly known as the evil color). There is also a synthetic jade, made of jade powder, crystals and brine, which looks quite similar to the dark-colored "old pit jade". The method of identification is very simple, because it is different from the specific gravity of natural jade, and can be weighed by hand, or weighed with a balance, and the heavier one is the real jade.

Jade classification:

Jade can be divided into nephrite and nephrite, which are two different minerals. The colors of nephrite are translucent white, yellow, green and black, with an even distribution of colors. Hard jade is mainly white, purple, yellow and green, with an even distribution of colors that varies from species to species.

The vast majority of jadeite produced in China is nephrite, and "sheep's fat white jade" is one of the treasures of nephrite, with its delicate texture and white color, and many exquisite jade artworks are carved from nephrite.

Burmese jade is the main source of jadeite, and is even rarer than nephrite. Since jadeite is superior to nephrite in terms of quality, color and price, jade jewelry is mainly made of nephrite and is in great demand by consumers, so we will focus on jadeite - Jadeite.

Appreciation of Jadeite:

The appraisal of Jadeite should pay attention to its color and quality, which can be subdivided into color, clarity, purity, cut and cracks, and usually start with its color.

Color

Color is the most important factor affecting the value of jadeite, can be assessed from the following four categories of jadeite color:

To be pure: pure refers to the proportion of jadeite main color and secondary color, green jadeite, for example, pure green is the best, green with yellow or blue with the second, with gray is the worst.

To be appropriate: on the color shades, of course, the thicker the better, but the color is too thick will cause the opposite effect, reduce the quality of jadeite.

To be distinct: the more vivid and bright the color of jadeite, the more attractive it is, and the more gray or black it contains, the duller the color is. To be even: the more evenly distributed the color is, the better it is, and the higher its value.

Transparency

The transparency of Jadeite affects the refraction of light, which affects the overall beauty. When the light enters the transparent and delicate texture of the jadeite, it will reflect a beautiful light, making people feel the jadeite's crystal transparency, greatly increasing its beauty. On the contrary, if the light meets a jadeite with low transparency and rough texture, it will reflect a dull light, which makes the jadeite much less attractive.

Cleanness

Cleanness refers to the imperfections contained within the jadeite, mainly white and black, which are caused by other minerals contained within the jadeite, with black imperfections being more obtrusive than white. The less impurities in the jadeite, the better.

Cutting

The processing of Jadeite products is divided into two categories: Bright and Carved. Bare-body products are not covered by the surface, so the raw material requirements are higher, in addition to no cracks, the proportion of the cut, the thickness and symmetry of the product is also very important, enough to affect the appearance of the finished product of Jadeite. For example, a well-cut "egg face" should not be too thick or too thin, and the "dab" should be in the center, and the proportion should be moderate.

Evaluating flower pieces is mainly a measure of their beauty and the fineness of the carving. Often, cracked jadeite will be treated with carving to hide its flaws.

Cracks

Cracks can greatly reduce the value of jadeite. If a jadeite jewelry piece has cracks, it may split along the cracks at the slightest impact. Therefore, extra care should be taken when purchasing jadeite jewelry. Generally speaking, it is easy to detect the presence of cracks by shining a torch on it.

High-quality jadeite can be sold at a considerable price, but the supply on the market is limited, and some businessmen are willing to go through the process of artificially treating jadeite in order to make a better profit. As a result, there are A-goods, B-goods and C-goods on the market.

Artificial Treatment of Jadeite

C-goods

C-goods refers to the fake color jadeite that has been artificially colored. The method is to use high temperature and pressure to infiltrate the dye into the original colorless jadeite, so that all or part of it is dyed emerald green or purple, but its color will become lighter and duller with time.

Goods B

Goods B refers to jadeite that has been chemically cleared of surface blemishes, impurities, and yellow parts, leaving only the original green and white elements, and then injected with epoxy resin glue into the jadeite as a reinforcement to make the whole jadeite look more transparent and more colorful. As the internal structure of jadeite has been damaged during the chemical treatment, the structure becomes loose, so B-goods can easily show cracks on the surface. If a coloring agent is added during the treatment process, it is called B+C goods.

Natural Jadeite

A Goods

A Goods refers to the natural Jadeite that is completely free from artificial chemical treatment.

China's jewelry industry predecessors, in the long-term production of jade processing practice, summed up a lot of experience about jade, and in the form of a brief and concise motto, expressed these characteristics of jade. Remember these maxims, and can understand and appreciate the profound connotation, will benefit for life.

No color under the lamp

In fact, no jewelry should be under the lamp for color quality assessment. This is especially important for jadeite. This is because the color of emerald, especially flash gray, flash blue and oil green and other emerald color, the visual effect under the light is much better than the color effect of natural light. Therefore, the light can only look at the jadeite locks, look at the length of the head, look at the degree of illumination or other characteristics. And to be in the natural light, inspect and assess the green color of jadeite.

Color difference of one class, the price difference of ten times