Jade processing, shape and carving knowledge

Jade processing and shape

For example, the highest grade crown green is generally used to be processed into jewelry such as semi-circular gems, bracelets or Buddhist beads. Processing also tends to be specialized: one craftsman may specialize in making rings, another in carving jade pendants, and so on. Polishing is especially important for jadeite.

The result of good polishing is that the jade has a good luster, so that light can pass through the semi-transparent or translucent parts cleanly from the inside to the outside. The way to judge the quality of polishing is to check the reflection of light rays on the flat surface of the jade. A perfectly polished jadeite will produce sharp dimples that reflect visible light without distortion. The following are some popular styles of high-grade jadeite.

Half-round gems: High-quality jadeite is often cut into round or half-round gems. The standard agent price uses a size standard of 14mm~10mm. The materials used for round and half-round gemstones are of higher quality than those used for carving, although there are exceptions.

For round or semi-round gemstones, the key factors in evaluation are the dome, bilateral symmetry and thickness of the semi-round gemstone.

The dome of a semicircular gemstone should have smooth curves, not be too high or too flat, and should have no irregular points.

The finest camels have no color variations or fluctuations visible to the naked eye.

Since the 1930s, pairs of semi-circular gems have been considered the ideal pattern for the highest grade emeralds, with the convex surface said to enhance the colour by reflecting light.

Hollow domes are considered to be much less valuable. According to traditional craftsmanship, when fine jadeite semi-circular gemstones are mounted in jewelry, they are surrounded by precious metals to enhance the color of the jadeite.

Bracelets are one of the most popular styles, and they often symbolize unity, harmony, elegance and feminine tenderness.

Jade ring: A round ring with a hole in the middle symbolizes eternity in Chinese culture. It is usually worn as a pendant or like earrings.

Ideally, the center diameter should be one-fifth the diameter of the ring and should be located exactly in the center of the ring. A small pair of hoops, often set in precious metal, was worn as earrings or as a chain.

Saddle (Emerald Ring). The jade ring is like a semi-circular gem that has been cut directly. The most beautiful area of ​​the saddle (emerald ring) is usually placed at the top of the ring. On the other hand, the parts with inferior color are relatively hidden. However, a high-quality ring should maintain the same color everywhere. However, a method that has become popular recently is the so-called ring face.

The highest grade small pieces of jadeite are set in precious metal rings as decoration. The selection of such small pieces of jadeite is quite strict. Special attention must be paid to the fact that the color must be uniform, without any spots of other colors and even less cracks.

Linked Rings: This rare double ring nest requires a high level of craftsmanship and high-quality rough stones to produce.

These perfectly matched rings, surrounded by rose-shaped diamonds, date back to the Qing Dynasty (1644-1912).

Carvings: In most cases, the jade material used in small carvings is of lower quality than the above varieties of jade; however, it is the most complex, richest, and most unconventional type of wearable or hanging ornament in the entire jade jewelry category. Its design is generally based on themes of joy, auspiciousness, love, blessing, and religious belief; people believe that wearing it can bring good luck, peace, eternity, happiness, wealth, a bright future, turning misfortune into good fortune, and blessing in times of trouble. The profound Chinese culture makes it more colorful and splendid.

The skill of carving craft design and implementation has an important impact on the value of jade carvings.

Reprocessing: Like many other types of gemstones, the value of jadeites that have been improperly cut or damaged is generally based on their reprocessing potential.

Forgery, coloring and filling of jade. Historically, there have been unscrupulous merchants in the jade market who have used various methods to dye jade, "purify" its surface, and eliminate internal discolorations.

In recent years, the three-level classification system of A, B and C has been widely used in the jade market in Hong Kong and around the world. It mainly indicates whether the jade has been artificially colored, filled or other physical and chemical methods to "improve" the appearance of the jade.

A-grade jade refers to jade products that have not been processed by any means other than polishing, cutting, and carving. Surface treatment is a method commonly used by forgers. In order to improve the gloss and fill the surface cracks and unevenness, soaking in wax is the last step in the counterfeit processing of jade. It is usually used to "improve" the finished jade after polishing. For example, a bracelet is first soaked in warm alkaline water for 5-10 minutes to clear the surface residue after polishing, then rinsed, dried, and then soaked in acidic liquid for about ten minutes.

Then, wash it, dry it, and then boil it in boiling water for 5-10 minutes. At this time, you must control the temperature to prevent the jade from cracking, and then soak the bracelet in pre-melted wax. Described above is the method used by counterfeiters to remove oxidation discoloration from rust stains on jadeite.
B-grade jade is jade that has been processed using physical and chemical methods, such as bleaching and acid soaking, in order to remove the brown or yellow color from the boundaries and cracks of the jade.

However, detection of this type of counterfeiting generally requires infrared light, which can only be detected in a gemological laboratory. In some B-goods, such bracelets (filled with resin) can be seen under a high-power microscope. Green and lavender jadeite produced from jade materials processed using organic dyes has been popular since the 1950s. Generally, staining can be detected microscopically. In addition, if red is seen in the 630 to 670 nanometers region of the visible spectrum, it is generally considered that the jade has been dyed.

In addition, some new varieties of dyes can show narrower widths at 600 nm. Because some jade is only partially dyed, the inspection must be complete and thorough.

Recombination to make fake jade, as well as other methods. These consist of using very translucent parts of jadeite of a lower color and cutting them into multiple pieces and setting them together. The emerald part in the middle can be sandwiched between the two sides, using a green jelly-like substance. The third piece is relatively flat, placed at the bottom, and has poor transparency.

This makes the entire piece of jade similar in color to high-grade jade. To increase its strength, the cavity is filled with epoxy resin. For greater deception, it is installed in jewelry with a hidden back. Another method is mainly used for jadeite raw stones, namely patches. After opening a window in the jadeite raw stone, a piece of green resin is pasted on it, and then another piece of jadeite with good transparency is pasted on it. Such forgery is common in the raw stone trade.

Ice jade carving techniques

Ice jade has a history of hundreds or thousands of years since it was mined. It can be said that the ice jade carving industry was born since the ice jade was mined. We can regard it as an industry, but more importantly, we can regard it as a cultural art. Ice jade carving is indeed a very profound art. Without systematic learning, it is impossible to appreciate its artistry. Even many carving apprentices cannot understand the mystery. What we are going to introduce here is the skillful carving based on the color of ice jade.

According to the color of ice jadeite, the carving techniques that can be selected can be divided into three types, namely: color matching, clever color matching and color separation. Qiao Se refers to the ingenious use of the color of ice jadeite in carving. Qiao Se goes a step further to control the color of ice jadeite on the basis of application, and is no longer restricted by the color of ice jadeite. Color separation: The colors of ice jade are strictly separated for carving.

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