A jade is good, its quality evaluation system consists of six elements: species, color, craft, shape (phase), crack ç‘•ç–µ, size and weight. Among them, the "species" of jade is the most important. There is such a jargon in the jade's connoisseurs - the layman looks at the color and the insider sees the species.
The jadeite is divided into seven grades, and the beans are the second to last.
What is "species"? In fact, it is the comprehensive performance of the mineral structure, particle thickness, transparency and gloss of the jadeite. The essential mechanism of the species is the degree of metamorphism of the rock. The degree of metamorphism of the rock is deep, the structure is dense, and the texture is fine. The species are old or well-known; the opposite is new or poor.
The jadeite species can be divided into seven grades: the old pit glass species—the glass species—the ice species—the hibiscus species—the white-green species—the common bean species—the taro species.
In general, the jadeite is finely sized, its transparency is high, and the difference is low. But it is not a simple correspondence. Frequently, consumers see jade with high transparency. They think that it is good to plant, and poor transparency means that the difference is poor. This is one-sided and there is no essential understanding of the species. Some connoisseurs prefer to use the old species to indicate good breeds.
The concept of the species has no direct relationship with the color, but the color is easy to cause misjudgment of the species. Thick and deep colors often affect transparency, while colorless whites are easy to see transparency. Consumers often encounter colorless glass species and ice jadeites to praise them, but they are suspicious of the full color and the good jade. Visible colors can confuse observation and judgment of species. In a jadeite, the radix is ​​often superior to the surrounding rock. The so-called shit out of the high-pitched, gimmick-like jade pit, said this phenomenon.
"Plant" is an essential prerequisite for high-grade jade. The jargon also says "one, two, three crafts", "low-grade color, high-end look".
Bean species, jade, easy to crack
Bean seed jade is the most common type of jadeite. The so-called "Ten Jade Bean" refers to the prevalence of bean varieties. Its structure is loose, the mineral particles are coarse and obvious, the texture is rough, and the fineness is poor. According to the fineness of the texture of the beans and the transparency, the beans can be divided into two types: ice beans and bean varieties.
For bean species, jadeites have two completely different attitudes. Some people like beans and jade materials very much. The reason is that the beans are more colorful, evenly colored, and the shipments are high, and the raw materials are relatively cheap. The finished products are also cheaper and competitive.
Others are very jealous, and even hate to abandon the bean species. They think that the beans are colored at the bottom, not the color of the roots. At the same time, the beans are coarse and new, and the hardness is lower than that of the old ones. The polishing effect is not bright enough. There are white flowers and white cotton, which has poor gloss. At the same time, because the processed products of the bean seeds are fresh and beautiful, the time is prone to reveal micro-cracks and white-flowered white cotton, and the species is prone to deterioration. Therefore, the jade merchants or old experts who sell high-grade jade and the collectors who have research on jade are right. The beans are confused and cautious.
In short, bean seed is the most common jadeite variety, and it is the main raw material source for middle and low-grade jade pieces. However, due to the new type of bean seed, jade pieces are prone to deterioration or micro-cracking after years.
In addition, the bean seeds are coarse and sometimes micro-cracked, which is easily confused with the surface of the B-car jade. This should be distinguished in the transaction and identification. Do not treat the B-car jade as a cargo jade.
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