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Chalcedony is the most common jade variety in nature, and the oldest jade variety, one of the history of human beings. In the Neolithic era, China has appeared in the Neolithic era, and has been endless generations.

1, the characteristics of chalcedony

The color of the chalcedony is colorful, and some varieties have strange patterns and beautiful patterns, which are breathtaking. The yield of chalcedony is rich in yield and low price, but it does not affect its unique beauty and conquer the public. In ancient times, it was a nobleman and rich in merchants, but now it has entered the home of ordinary people and has become a popular jade variety.

The chalcedony chemistry point is SIO2, hidden crystal quartz set. Therefore, the chalcedony is very delicate. The quality of the chalcedony is pure, and it is a colorless or white, but it usually contains one vector or a small amount of other minerals, which leads to colorful colors. When the uneven distribution of shoes contained in other minerals, or various patterns or striped patterns in regular distribution, appear beautiful.

The refractive index of the hardness of chalcedony is about 6.5, density of 2.58 to 2.64, and 1.53 to 1.54. Transparent to slightly transparent, glass luster to oil luster, good toughness, almost all kinds of colors.

The chalcedony classification and variety of chalcedony according to the color of chalcedony, patterns and internal mixed objects can be divided into three categories: ordinary chalcedony, agate, and blue stone. All types and varieties. Ordinary chalcedony:

(1) refers to a unified color pattern and chalcedony. It is bright and beautiful. The translucent texture is very strong, so popular art and crafts and jewelry materials. Color: white, red, yellow, brown, green and other colors. Variety agate color gaps, meat, red agate, green chalcedony, light green chalcedony, chalcedony ink and white chalcedony. In the United States, Britain and Australia, agate, ruby? The birthstone in July symbolizes passion, love and dignity. Green chalcedony and emerald are the birthstreams of May, symbolizing good luck and happiness. Known as "Australian Jade" or "British Card Shijiyu, green chalcedony produced by Australia, green lush, beautiful and gratifying, and the price is much cheaper. n (2) Mineral impurities, such as clay minerals and iron oxides, which contain bone marrows and are also called liver stone impurities. It is often as high as 15 %. , The luster is also deeply popular. Pittelite is very rich. The color of its varieties, red jasper, green jasper, white blue stone, Ms. Yellowstone. In fact, the blue stone ground is often uneven, colorful mixed colors The varieties are becoming more and more common, except for monochrome varieties. The dark green red, brown and red spots are called "blood dripsticks" or "blood rock stars," blood rock stars, "blood stones" because The color contrast with a strong visual effect is very beautiful. Sea blue gem jewelry and customs in many countries are in the green background. It is scheduled to be in March. The color of the colors or landscape picture pattern is collectively referred to as "picture jasper", which can also be divided into strip -shaped landscape jasper jade and jasper. Specifically, this green stone is mostly used directly as the ornamental stone.

(3) Agate: Concentrated -hearted mode model of various parallel modes, chalcedony, contains clay impurities, usually no or very small. Agate patterns have a lot of styles.

The Buddhist scriptures transliterate from the Sanskrit "Asma Garobo", which means "horse brain, named the color of jade, and the texture is like a horse brain. Because "the horse brain is jade, the ancients translated, it means" agate ".

3, agate classification varieties

The ancients often gave a specific name based on the pattern and color. Miscellaneous items and its names are more, such as "Golden Agate", "Bamboo Leaf Agate". n
The modern agate classification, and consider the characteristics and colors of the pattern, different colors of agate, different patterns, different special optical effects, and particularly hope of its name, but his pattern and color. Different characteristics are divided into four categories.

: Divided into prominent color features

It is usually divided into its main color yellow agate, red agate, blue agate, purple agate, green agate, (ghost green), gall green agate, white agate variety, including natural blue agate, purple color shows its beautiful patterns Bring. Agate, green agate is rare to see dyeing in the market.

red agate, red agate, jujube red, red sauce, red, orange and other colors. In ancient times, it was called "red jade "Yes, one of the best species of agate." In the study without red agate, agate is not red, they are not high value. This is because there are not many red agate produced naturally, especially large pieces, and the price is naturally high. Modern thermal treatment and dyeing technology, red agate is very common and cheap.

: Highlighting patterns

. For example, the pattern known as agate can be divided into the following varieties according to the pattern and different characteristics or patterns:

/> Agate, the same agate mode. Agate originally refers to the white line, and its fine particle size is as silk. Agate, which means a very thin parallel mode and agate.

The color of this variety is limited. Different colors of fine lines, two colors of white grape varieties. The most famous varieties, red agate, red or brown -red, white and fine parallel stripe varieties, imitating red shuttles around white silk, very beautiful. In many countries, olives, jewelry, and customs are scheduled to be in August. If you are lingering, the symbol of the happiness and harmony of the couple, the favor of the happiness stone ".

缟 Agate is in different colors, but there are also some varieties that include black and white agate, red agate, red agate, red agate, red agate Previously, in addition to the above -mentioned red and white agate, black and white agate, red agate, brown and white agate, black -brown agate red agate, red and white agate.

Agate is usually a different monochrome, or a color composition arranged in two stages, rarely two or more colors. Depending on their different colors, it can also be divided into multiple varieties. In addition, the coating white ribbon Black agate varieties, known as "Hezi Agate.

Monthly long stone, man, animal, plant pattern or sea? The screen of Yunhai, Sunrise, Landscape, etc.: When different colors, patterns and opaque impurities in combination, the natural number of agate "Remember Jiangnan" The real rich man's mood is not easy to get, and it cannot be valuable because of this. It is often collected. More opportunities.

Moonstone, independent vertical differences should be "moss agate" or "plant agate, one of it is more common, ancient, very famous, it is translucent colorless transparent or milky white white or milky white white Agate contains opaque impurities such as iron oxide, manganese oxide or green mudslides, such as moss, plants, pupa -like patterns, and colorful greens. Black, mixed color, but it can also be seen that the lakes that you can often see that you can often see the water and plants in the lake, or the weeds of weeds of the watercuts are reflected or like the mountains and forests, etc. Pictures, beautiful and amazing.

The famous stone in Nanjing, many days of illusion of art treasures, known as "China One" and "Jinling Yiju". Boutique, most of the moonstone . Small agate pebbles are quite old -fashioned, and foreign websites are refreshing.

It, cloud agate "or" agate, especially its clouds, fog cover agate. Agate, especially the initial formation of turtle patterns. Similarly, according to the shape of the pattern, "torch agate," mushroom agate "", "city king agate" and so on.

Monthly stone as carved jade materials, unless the theme design needs, can generally be directly used as an ornamental Stone, or when placed, or put it in water, or play with a great movement of the stock palm. Special optical effects

:

. For example, for example, for example Agate rare agate has some special optical effects, which can usually be seen in two species.

Thisy agate: This agate is layered, a layer between each layer, a layer between each layer, Thin packaging materials, such as sheet -like oxidized iron mineral crystals, when light is illuminated, the phenomenon of thin film interference is generated, flashes of fiery red faint, so -called fire agate.

Fighting agate: Agate: Agate The stripes are easier to find each other after the lighting interference is polishing. The brightness changes. When the changes in the angle of the light irradiation, the changes in the shadow mode are very beautiful and interesting. The agate of Xinjiang agatestone in Nanjing Yuhua Terrace is sparse.

four categories: the famous mixed agate-water gall agate
n The agate closed cavity contains water or water solutions. Sound. "R

" Big "water" is mostly good, transparency, cracking and flawed water gall agate, excellent jade material.

The changes in the agate sculpture "The top of the mountain water: a naive deer, went to the water of Tan (water tank) side of rice, drinking, interesting. "Taibai drunk gall agate crafts, portrayed the wine fairy poet Li Bai, the water tank of the Great Wall crafts factory with the vivid image of the images of the drunk sleeper (water tank) using the above works. It can be said that it has achieved extreme natural water bile agate, especially good quality And extremely rare, their handicrafts. They did not become a rare treasure.

4, the requirements of agate crafts and grades

The agate varieties, but mainly in the above four categories . Craft requirements: Highlighting the strip bands clearer, more detailed, more precious pattern, excellent colors, red, blue, purple, color is the most valuable highlight mode, the most valuable, special optical effects The shape of the unique optical effect is more intense. Zhao is obvious, the more precious; the agate water tank, its "gall" water "and the high preciousness of removal. All varieties need to be as little as possible. No cracking is the best. Even if there is, it should be less, short, light, and does not affect the application. In addition, in addition to the water and beautiful beach hearts in the water tank, the best sand heart can be fully utilized. If so, it can also be removed as an impurities in the application process. Sand Xin is large, but not the United States, and waste.

The overall, the most precious, the most special optical effect in the agate water tank, the flash agate is more precious than sparse. Colorful, harmonious multi -colored agate is the best, this is a beautiful jade material for colorful jade. The so -called "pretty color" refers to the works used in color, and the extreme emotions of "beautiful" are called "absolute". The absolutely exquisite "pretty" value of art and crafts can be determined far more than valuable materials. The agate pretty jade carving jade carving industry specialty products. College of Art of Chicago.

5, the origin of agate

quality of agate, such as Brazil, India, Russia, the United States, Japan, and others. The production of agate is very rich in variety, there are many places, and the output of several families in each province and autonomous region. The most famous place of origin Liaoning, Hebei, Inner Mongolia, Heilongjiang, Yunnan, Ningxia, Xinjiang, Jiangsu. In addition, agate output of Anhui, Hubei, Sichuan and other provinces.

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