The old pit species and the new pit species are all one of the proper nouns of the jadeite grade. The old pit and the new pit are actually divided according to the years that people discovered and extracted jade. Recently, it has been suggested that the old pit species must be " Old"?
One: old pits, new pits are old and new
Jade has primary and secondary mines. According to Fang Wei, chief designer of Baoqing Yinlou, the formation of primary ore is due to the pressure movement of mountainous geology. The jadeite produced in the original ore is mostly not delicate and feels dry. Insufficient water head. The original deposits have some ore of different quality. After the flow of water, some of the poor quality, impure jade will be naturally sorted, eliminated, and finally the jade that remains in the riverbed is washed and soaked by the river for a long time. Some minerals enter the jade and exchange material. The minerals are uniform in color, with sufficient water head, texture and structure.
In fact, according to the geological point of view, the geological ages they formed in the underground are the same, only the different years of mining jade. "You can't simply judge the age based on the words 'new pits' and 'old pits'. Some new pits are formed earlier than the old pits," said the designer.
Two: the old pit species are glass species, ice species
The most recognized in the market is the old pit glass, which is the top or best of the jade jade market. The glass type has a glass luster, and its texture is fine and pure and flawless. The color is pure, bright, rich and uniform. The emerald green pits are translucent or transparent under the illumination of light. Ice jadeite is slightly worse than glass, and there are visible particles inside, which is second to none, but high-grade ice jade can also be called high-end products. Cheng Ge introduced: "Glass species and ice species belong to the typical old pit species. This is determined by its formation conditions. After the scouring and soaking of the flowing water, it can leave such delicate products, but the old pits are not necessarily Can reach the level of glass, ice, or there are many poor quality 'slipping fish'."
Three: old pit, new pit and old pit species, new pit species
In fact, these two groups are different concepts and are easily confused. The jadeite's primary mine is called a new pit, and the secondary mine formed by natural forces such as river water is often called the old pit. The jadeite secondary mine (old pit) is often produced with high-quality jade. These high-quality jadeites have outer skin, fine texture, small crystal particles, water head (good transparency) and heavy specific gravity, so they are called old pits. Relatively speaking, the original ore (new pit) texture is generally the majority, the texture is rough, the water head is poor, the proportion is also slightly light, so it is called the new pit species.
In fact, it is understood that the original mine (new pit) will also have high-quality jadeite, although the number is very small, it can also be called the old pit species. Since the old pit has almost no output at present, many new pits on the market come from the new pit. The old pit and the new pit are the concepts of geography and the distribution of geology and minerals, while the new pit species and the old pit species are the concept of jade quality. As long as it is high-quality, high-transparency, crystallized and delicate jade, it is the old pit kind of jade.
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