The cat's eye effect must have two conditions: one is that the gem contains a large number of parallel arranged inclusions, or the gem is a set of oriented cleavage lines composed of fibrous, long columnar minerals in a certain direction. The inclusions may be gas-liquid inclusions, fibrous, needle-like crystals (such as rutile, tourmaline, etc.) or tubular, hollow (such as negative crystals, elongated bubbles, etc.) left by the crystal during growth. Second, the gemstone must be cut into a curved surface with the bottom surface parallel to the plane of the inclusion. If the two are not parallel (with a certain angle), the eyeliner position of the cat's eye is not centered or even disappears.
Cat eye gem
First, the gemstone contains a large number of parallel arranged inclusions, or the gemstone is a set of oriented cleavage lines composed of fibrous, long columnar minerals in a certain direction. The inclusions may be gas-liquid inclusions, fibrous, needle-like crystals (such as rutile, tourmaline, etc.) or tubular, hollow (such as negative crystals, elongated bubbles, etc.) left by the crystal during growth.
Second, the gemstone must be cut into a curved surface with a plane parallel to the surface of the inclusion. If the two are not parallel (with a certain angle), the eyeliner position of the cat's eye is not centered or even disappears.
Nowadays, many people actually use the standard of jade to collect cat's eye nephrite, so they will say the words "water head", "chroma" and "netness". In fact, the water head is not required in the general jasper finished products. Generally, the soft jade collection pays attention to "run" and "oil". From this point of view, the aesthetics of the jasper cat's eye and the standard of the jade or nephrite are different.
The jasper cat's eye is currently in the form of a ring face and must be made into a special shape. This is a deficiency of the jasper cat's eye relative to the opal and other cat's eye. If the ordinary water droplet surface is made, the cat's eye effect is not obvious. But it's not a flavor!
Several jade species of jasper cat's eye
The jasper cat's eye belongs to the nephrite cat's eye. This craft comes from Taiwan and has a long-standing reputation in the world. The price of the fine jasper cat's eye is also very high.
Taiwan jasper cat's eye
The earliest batch of jasper cat eyes appeared in Taiwan. The jasper cat's eye in Taiwan may be the first to be noticed because of the early prosperity of the market. Taiwan jasper cat eyes, also known as Hualien cat's eye, or Toyota cat's eye, is characterized by water head, transparent, clean, but Taiwan cat's eye jasper is obviously not strong on the basic jade of jasper. Therefore, Taiwan’s cat eyes are not so good in quality and recognition. The color is light gray and not green enough. Taiwan's cat's eye production is not small. It used to be sold to foreign guests by the unscrupulous merchants as "golden-green" color green cat eyes.
Taiwan jasper cat's eye
The price of Taiwanese cat eyes is not high, but Taiwanese people like black cat eyes, which is a kind of black color in Taiwanese cat eyes. If the cat's eyes are thin and bright, it is also price scary. However, it does not seem to conform to the aesthetics of the Chinese people.
Canadian Jasper Cat Eye
The most popular on the market today is Canada's cat's eye jasper. The quality of Canadian jasper is inferior to that of Russian jasper, and it contains many flaky green pieces. The impurity content is large, and the greenness is not as fresh as Russian jasper. Compared to Russian jasper, the Canadian jasper cat's eye also has a problem of light gray. But it is much better than Taiwan's jasper jade.
Canadian Jasper Cat Eye
Now let's talk about the most respected Russian jasper in the eyes of Jasper. Russian jasper itself is currently the best jasper material, so the jasper cat eyes appearing in it, the comprehensive evaluation index is high. This is not for us to stir up Russian jasper. But the fineness, clarity and hardness of Russian Jasper are really good. At present, the best cat's eye jasper is mostly based on Russian jasper. Good quality Russian jasper cat's eye, color is green enough, transparency is large enough, fineness and density are good, water head is enough.
Russian jasper cat's eye
Russian jasper cat eyes are rare, because the Russian material is not like Taiwan jade, the Russian material is not transparent, nor water, so only a small amount of material can be processed into a gem-quality cat's eye. In addition, only the material of the Russian old mine can be processed into a gem-quality jasper cat's eye. The old mine has been discontinued a few years ago, the new mine's material is relatively scattered, and the pure green material that can open the ring is very limited. The old mine is located in a lake in Siberia. Because it is famous for producing cat's eye, in Russia, cat's eye jade is also called Siberian cat's eye.
The truly green jasper cat's eye is more collectible. The green cat's eye has the bottom of the water (also called the "glass bottom") and the "fat bottom". The bottom of the fat is more in line with the aesthetic standard of Hetian jade, but the general "head" of the bottom of the fat is not as good as the bottom of the glass. it is good. In recent years, the price of the glass bottom has exceeded the fat bottom, which is also a peculiar phenomenon in the collection of nephrite. Therefore, many collectors' collections of Obi's cat's eyes actually look at their unique beauty comparable to jade.
Several criteria for selecting jasper cat eyes
Having said that, how do you choose the jasper cat eyes in the end, how to distinguish between good and bad? There are probably the following criteria:
First, the color should be positive, and there is a feeling of "lighting up". The so-called positive, must be to choose the kind of bright green background. The friend who plays the cat's eye uses the green color as the top color name of the jasper cat's eye. This word is very expressive.
Second, the jade arc surface should be rounded, the cat's eye line should be thin, and in the middle of the curved surface, bright, straight and unobtrusive, when shaking or light moving, the "eyeliner" can move flexibly. "The greener the color of this jasper cat's eye, the thinner the cat's eye, the higher the value.
Third, the transparency is good. Don't be the kind of raw material, the face should still be transparent enough.
Fourth, the finer the finer the better. However, in general, because of its high density, all jasper cat eyes are not too fine.
Fifth, pay attention to whether there are black spots and splits inside, and choose those varieties with pure texture and no flaws.
The "eyeliner" of the real jasper cat's eye is a bright reflected light band formed on its curved surface, and the ribbed ring of jasper is not the real jasper cat's eye. Jasper is a dark green translucent Hetian jade. Most of the fibrous minerals inside Jasper are not arranged in parallel, so the cat's eye effect is rare. In order to pursue the cat's eye effect, a raised ridgeline is polished in the middle of the curved surface of the jasper, so that the reflections on both sides are different, forming a cat-like effect. However, such "cat eyeliner" cannot be moved, and it is commonly known as "dead cat's eye".
Finally, it is still necessary to say that in addition to color, the most important thing is that the cat's eye must be concentrated, and it can move left and right. It is a live cat's eye. The cat's eyes are not concentrated on the cat's eyes, the price is greatly reduced, the cat's eyes can't move, and the cat's eye is called. This is processed by the jasper material with waterline, not the cat's eye in the true sense. Many jade friends mistakenly think that the cat's eye is the waterline, which is actually the result of being fooled by the seller. In the eyes of a good jasper cat, it is difficult to accommodate the waterline. Physically speaking, the cat's eye requires a dense and orderly arrangement of the parcels in the nephrite. The key is "orderly", as if all the grass is long in one direction. Polished cat eyes, so cat eyes and water lines can be said to be natural enemies.
In addition, the evaluation of jasper cat eyes is different from people's traditional understanding of jade. If different colors and different viewing angles can show different color changes, this jasper has unique collection value and aesthetic value. However, it should be noted that jasper, which is not a cat's eye effect, is more valuable, and does not reach a beautiful jasper cat's eye. The collection value is not large.
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