Jade, also known as jade jade, jade, jade, Burmese jade, is a kind of jade, the color is emerald green (called Cui) or red (called 翡). The name of the jade comes from the name of the bird. The feathers of this bird are very bright. The male feathers are red, the name is ostrich, the female feathers are green, and the famous kingfishers, collectively known as jadeite. When the Ming Dynasty, the Burmese jade was introduced to China. It is named after the "Jade". Jadeite grade identification Put the jade under the fluorescent lamp and observe the color change. The A and C goods do not change. The B goods are fluorescent and white. The C cargo is dyed, so its color is distributed along the crack and the distribution is uneven. It can be seen by carefully observing the naked eye. The specific explanation is as follows: ·A cargo jade, natural jade, is a natural jade that has not been chemically treated, color, and natural results. ·B goods jade, bleached plastic jade, is a jade with strong acid cleaning and injection, strong acid soaking, cleaning helps to improve the transparency and color of jade. · C jade, dyed jade, is an artificially colored jade, usually colored with organic or inorganic dyes. · B+C jadeite is an jadeite that has been treated with strong acid cleaning and injection and artificial coloring. Color is the first factor to evaluate jade. The standard to achieve good color is: positive, strong, positive, and average. Positive: It refers to the range of hue, depending on the ratio of the primary color to the secondary color, that is, to be pure green, and not to mix other colors. For example, in oil green, there is often mixed oil blue, and the value will decrease. Concentration: refers to the depth of the color. In terms of emerald green, the concentration is preferably between 70% and 80%, and 90% is already too thick. Yang: refers to the brightness of the bright green color of the jade, and the brightness of the jade is mainly determined by the proportion of green and black or gray in the jade. The green color ratio will be brighter. If it is black or gray, the color will be gray. Experts often adopt the image method to express the fresh color of the color. For example: boxwood green, parrot green, green onion, green pepper, all refer to the color of fresh yang. Spinach green, oil green, river green, black green, refers to the dull dark green color. The more fresh the jade, the higher the natural value. Both: refers to the uniformity of the color distribution of jade. The color distribution of jadeite is generally uneven. It is not easy to get a jadeite with a uniform color distribution. The best color: it should be green pure, green concentration is 70%-80%, Yanyang bright, uniform color distribution, this kind of high-grade jade, the customary habit is called old pit. Emerald Full Green Maitreya Pendant transparency Jadeite is polycrystalline, mostly translucent and even opaque. It is impossible to be as transparent as a single crystal gemstone such as emerald, so that the light can pass freely and appear crystal clear. structure Refers to the thickness of the crystal particles that make up the jade, the shape of the crystal and the way it is combined. The jargon is called the "bottom" and has the name "ground". Cleaness Like other gems, jade is a major factor in assessing value. The jadeite is mainly white and black. When evaluating jadeite, the value of jadeite is determined according to the degree of damage caused to the jadeite beauty. For high-end goods, the next time is a serious shortcoming, and for medium and low-end goods, the impact will be much smaller. Relatively speaking, the effect of black flowers is more than that of white flowers. Cut The processing of jade products is divided into two categories: finished products and finished products. Light body products require high raw materials and can not be cracked, because it is easy to see when there is a crack. Cracked jade, mostly used to make flower pieces, can be used to cover up cracks by engraving. Therefore, in the evaluation of the finished body and flower parts, in the case of the same quality, the light body products are more expensive than the flower carvings, of course, there are exceptionally exquisite carving jade. crack The existence of cracks is often a fatal injury to the finished jadeite. With cracks, the value of jadeite will be greatly reduced, especially for high-grade jadeite. Generally, a flashlight can be used, which is easy to see with fluoroscopy and cracks. Economic evaluation factor 1. Transparency: Translucent is the best, too transparent or opaque. 2. Structure: The finer the particles, the better. 3. Clarity: The best innocent. 4. Cut: "Jade is not a tool" design, carved shape, polished, fashionable. How to identify the grade of jade? Grading 1 special grade: bright green (emerald green), apple green, glass ground (translucent, fine texture), even and bright, no impurities, no cracks. 2 Commodity grade: green, oil green, micro-transparent, intertwined and translucent grandmother green veins and spotted green. 3 general grade: 藕 powder ground, bean green, light green, white delicate, slightly transparent. Opaque jade, generally only used as jade jewelry. Quality identification 1 texture. The natural jade texture is transparent or translucent, and the surface is oily and lustrous. Careful observation reveals a slightly rounded, slightly transparent "salt grain" and fibrous material surrounding it. 2 hardness. Natural jadeite is jadeite, the Mohs hardness is 7 degrees, and it is scored with sharp tools, leaving no traces; the fake jade has low hardness, and the sharp knife can draw traces. 3 green. The natural jade looks at the strong light, and it can be seen that there are other green mineral glitters, which are called green flowers or green. The fakes made of glass, plastic and porcelain have no such "green" characteristics. 4 relative density (specific gravity). The natural jade structure is hard and compact, has no bubbles, and has a high density. The sound is crisp when struck; the fake product has a loose structure or bubbles, and the density is small, and the squeaking sound is not crisp. 5 colors. The authentic green color is pure and pure. Some fakes are made of white jade, serpentine, Australian jade, Korean jade, marble and even miscellaneous stones. After decolorization, they are filled with high-hard plastic pulp and added for color treatment, or immersed in green liquid to make "additional jadeite". "Under the strong light, the green lines are visible, messy and small; some are not grainy, but the turbidity is unclear, the gloss is poor, and the weight is lighter than the original." The above-mentioned fake product is placed in the boiled wax liquid, and the poured pigment is gradually precipitated. This test will not damage the sample being tested, but also identify the true and false. Observed by the Selsey filter, the color Cui is purple in the mirror, and the natural color does not change. Some fake jadeites are artificially smelted with glass, the structure is slack, the green is evenly dark, some have bubbles, and they are hit with a hard device, and the sound is hoarse. Fake jade Malay Cui (Jade), its transparency is green and beautiful like high-grade jade. But it is not difficult to identify, look at the glare with a magnifying glass, there is a fishnet-like pattern inside, the net of the fishing net is green, the mesh is white, unlike the green inside the jade, the size and shape are uneven and irregular. 
How to identify the grade of jade?