If you come across jadeite with this characteristic, don’t miss it!

The value of jade is not judged by its age. When collecting jade, one should not only choose pure natural authentic products, but also pay attention to its type, water content, and color. The quality of jade jewelry should be qualitatively and quantitatively graded and evaluated based on color, transparency, texture, purity, and processing technology.

The scope of application of the "Jade Grading" standard: natural unmounted and mounted, polished jadeite. However, jadeite raw stones, jadeite that has been bleached, filled, dyed, etc., and some imitation jadeite are not subject to grading according to this standard.

The standard introduces the definition of jadeite: Jadeite refers to a mineral aggregate with technological value, which is mainly composed of jadeite or other sodium, sodium-calcium pyroxenes (sodium chrome pyroxene, diopside), and may contain small amounts of amphibole, feldspar, chromite and other minerals. Mohs hardness: 6.5~7, density: 3.34g/cm3, point measured refractive index: 1.65~1.67. Jade grading divides jade into grades based on four aspects: color, transparency, texture, and clarity, and evaluates its craftsmanship.

The color of jade. Jade is the most colorful jade in the world. The jade grading standard divides jade into colorless to white, green, yellow to red, purple and combined colors according to the main color. The colors of green, purple, and red-yellow jade are graded based on differences in hue, chroma, and brightness.

The transparency of jadeite, transparency refers to the degree of transmittance of visible light by jadeite, also known as water head. Good transparency means full water head or long water head. Colorless jade can be divided into five levels: transparent (glass bottom), sub-transparent (ice bottom), semi-transparent (glutinous bottom), slightly transparent (winter melon bottom), and opaque (porcelain bottom or dry white bottom).

The colored series such as green, purple, and red-yellow jade are divided into only four levels: transparent, sub-transparent, semi-transparent, slightly transparent to opaque.

The clarity of jadeite is divided into five levels: extremely pure, pure, relatively pure, moderately pure, and impure, depending on how its internal and external characteristics (natural inclusions and defects inside or on the surface, etc.) affect its beauty and durability.

The processing technology of jadeite, "If jade is not carved, it will not become a useful object." The value of jadeite products depends not only on the quality of jadeite, but also on the processing technology of jadeite. The technological evaluation of jadeite includes two aspects: material application design evaluation and processing technology evaluation. Material application design evaluation is further evaluated from the perspective of material application and design.

The processing technology is evaluated from two aspects: grinding technology and polishing technology. A good jade artwork always requires proper material selection, beautiful shape and harmonious proportions. The carving is precise and delicate, and the polishing is in place, even and smooth.

The texture of jade. The texture of jade refers to the comprehensive characteristics of factors such as the size, shape, uniformity and the relationship between the mineral particles that make up jade. According to the difference in jade texture, it is divided into five levels: extremely fine, fine, finer, coarse, and coarse.

What are the characteristics of good quality jade? The green color should be pure and not bluish, the green color should be evenly distributed, the water content should be good, there should be few impurities and cracks, the jade should be old, the green weight of the jade should be greater than 5 carats, and the workmanship should have cultural connotations, be exquisite and novel.

The green color must be pure. Among the many colors of jade, green is the most precious. The purer the green tone of jade, the better. It should be as free of yellow, bluish and gray as possible. The purer the green, the higher the value of the jade. The green color should be evenly distributed. On a piece of jade jewelry, the more evenly the green is distributed, the higher its value. The water head should be sufficient. The water head of jade refers to the transparency of jade.

The more water a piece of jade has, the higher its transparency, and the higher its value. The fewer flaws a jade has, the higher its value. The more flaws a jade has, the lower its value. Although it is said that beautiful jade is flawless, jadeite is a naturally formed mineral and it is impossible for it to be flawless during the formation process. If you like jadeite, you have to accept its flaws.

There should be fewer cracks, as cracks not only affect the beauty of jade, but also its strength and value. Cracks in jade can have fatal effects on jade. In mild cases, it will leave hidden dangers of jade breaking, and in severe cases, it will directly cause the jade to break. When selecting jade, you must pay attention to whether it has cracks.

The type of jade should be old. The type of jade refers to the structure of jade. Jade can be divided into old and new types. Generally, the older the type, the finer its structure. The workmanship must have cultural connotations. China is a country with thousands of years of jade culture. If any piece of jade does not have cultural connotations, it is just a handicraft. It will not become a work of art and will not have much value. Therefore, the workmanship of jade must have cultural connotations.

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