Quality identification method for ice jadeite:
"Plant" is one of the keys to measuring the quality of jadeite. It refers to the thickness and transparency of jade texture. The top grade is old, the second is new, and the old ones are better after processing. Jadeite should look at the color under the conditions of good cultivation. This is what the jargon says is "the layman looks at the color, and the insider sees the species." We will focus on the glass and ice in the jadeite variety and see how to choose good glass and ice.
It should be said that the current jade lovers are very concerned about the jade germplasm. Buying a glass of jade is a lot of people's ideas. Differentiating between ice and glass, most people look at transparency. Compared with ice jadeite, the glassy jadeite crystal grains are finer and more transparent, while the ice type jadeite is also very good in water and very transparent. In this case, facing an emerald, relying solely on transparency to distinguish between glass or ice is not easy for many people. In the case where it is impossible to distinguish between glass and ice, there is a simple way to judge it - whether it is marked by fluorescing.
The fluorescing, that is, the kind of glass with fluorescence; it is very transparent but not strong, it is ice. Jade has a thick problem, the thinner it will be, the more transparent it is. This is especially important for ice and glass. Some jade merchants often make the ice jadeite very thin, and then use K gold inlay, reflective surface to the bottom, so that the ice jade looks like glass. Therefore, it is judged that the ice species and the glass species must be based on a certain thickness.
Glass is more valuable than ice. Many jade lovers are very concerned about ice and glass. One of the main reasons is that glass is worth more than ice. In fact, it is generally incorrect to assume that the value of glass species must be higher than that of ice. For example, pure white glass, the most expensive flower is about tens of thousands of dollars, and the full bloom of ice, if the shape is full and full, one can sell for several million yuan. Therefore, it is important to fully understand the value composition of jadeite, rather than distinguishing between ice and glass. Under what circumstances is it important to distinguish between ice and glass? That is the pure white variety in jade. Due to the same size of pure white ice and glass, the price difference is very large, at least 10 times, so it must be clearly distinguished. In practice, many collectors bought the flower pieces of white ice as glass, and spent thousands of dollars. They also felt that it was very cheap, that is, there was no clear distinction.
Glass and ice are very transparent, and the particles, impurities and splitting are easy to see and even clear. Impurities are of course a disadvantage, but they cannot be completely seen for jade. Because jade is not a diamond. As a single crystal mineral, diamonds are not allowed to have impurities visible to the naked eye. Jadeite is a combination of various minerals, and there are bound to be various structural and crystal changes. Most jadeites are opaque, while ice types and glass types are fine and clean. You can see the structure inside. If you don't know how to do it, you will think that such jadeite is not perfect. In fact, it is the defect that contrasts with the exquisite jade texture. A high quality jade has a bit of impurities and is generally not a big problem. In fact, the top jadeite is not without any embarrassment. Looking at a jade, it is not a matter of picking, but looking at a few big aspects, seeing the most rare places - good species, lustre, good shape, This is very rare. Just because of the impurities, the good jade is missing, it is a shortcoming.
Ice seed jade identification assessment method:
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 jadeite, natural jade, is a natural jade that has not been chemically treated, color, and natural.
B goods jade, bleached and glued jade, is a jadeite that has been cleaned and glued with strong acid. Soaking and cleaning with strong acid helps to improve the transparency and color of jade.
C goods jade, dyed jade, is an artificially colored jadeite, 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 coloration.
Evaluation:
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.
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