Old pit kind of jadeite, jadeite world commonly known as "old pit glass kind", usually with a glass luster, its texture is fine and pure, no defects, the color is pure, bright, rich, uniform emerald green: old pit kind of jadeite to fiber interwoven variegated crystal structure, hard main grain is very fine, therefore, with the naked eye is extremely difficult to see " Jadeite"; Old pit jadeite is translucent or transparent under the light, is the top quality or the best jadeite.
Texture: fine and pure without defects Color: pure, bright, rich, uniform emerald green Grade: top quality or the best.
Old pit kind of jadeite, jadeite grade one of the proper name, refers to the jadeite structure dense, pure green, uniform distribution, fine texture, good transparency, hardness.
Old pit variety jadeite belongs to high-grade jadeite, that is, the color first has a certain concentration, is dark, but deep but not dark, bright and pure green color, that is, the color is not grayish, good uniformity. In addition, the texture is more delicate and the transparency is better, i.e. glassy. Of course, even if all called old pit species, its quality is relatively high and low, some transparency is high, some transparency is a little worse, so the value is also different, but in any case is more attractive varieties of jadeite, often used to do high-grade jewelry with.
The reason why it is named old pit kind is because of the Chinese concept that the older the year, including jadeite is the most beautiful, including darker color and better transparency, in addition to this texture jadeite mostly found in secondary deposits in Myanmar, and Myanmar jadeite secondary deposits were mined earlier, therefore, it is called old pit.
The old pit and the new pit are actually divided according to the year in which people found and mined jadeite, according to the geological point of view, they are formed underground in the same geological era. The secondary deposits of river deposition are made by river transport to the riverbed in the Quaternary period, so it can be said that the deposits are formed later in time.
Some connoisseurs from the long-term practice found that the quality of jadeite in the "old pit" is better, moisture is also more adequate, which is true. Is it due to the long time soaking in the river, water into the crystals formed? In fact, it is not, the quality of jadeite found in the river deposits is better, it is high color, fine quality, good transparency, for this situation, can get a reasonable explanation from the geological theory.
In fact, these phenomena exist in jadeite deposits, and they also exist in other gemstone deposits, such as diamonds in alluvial deposits, which are of better quality than those in primary deposits.
This is because the primary deposit actually has various kinds of ore of different quality, through the water transport, deposited into secondary deposits, some poor quality, such as fissures, coarse grained, loose structure, impure jadeite will get the natural sorting, elimination. Finally, the jadeite that is kept in the riverbed is mainly the jadeite with tighter texture and finer grain structure. This kind of jadeite is often more transparent, but not caused by water entering, water is unable to enter the jadeite crystal, the jadeite of old pit is better quality, because of this relationship.
This kind of jadeite appearance of a layer of skin is due to when the jadeite exposed to the surface, by the natural oxidation and hydrolysis of some of its iron and manganese precipitation and become a kind of iron oxide or manganese oxide attached to its surface, forming a layer of shell, as not often used knife, its surface contains oxidation rust the same reason.
We can say that the quality of jadeite in the "old pit" is better, but there are also good quality jadeite in the new pit, but relatively few. This is the result of unsorted jadeite.
Many people prefer old pit jadeite when they buy jadeite jewelry because it is commonly believed in the jade industry that if a piece of jade is older, its color, moisture, transparency, etc. will be better compared to new pit jadeite which is more tender, lighter and drier. ...... Is this really the case?
How to distinguish between old pit and new pit? The old pit and the new pit are actually divided according to the year when people discovered and mined jadeite, according to the geological point of view, they are formed in the underground in the same geological era.
To a certain extent, the old pit jadeite is a little better than the new pit jadeite quality, moisture is also more adequate, transparency is better, this is why? Some geologists have given some explanations from geological theories.
Some geologists have suggested that the jadeite with better quality is usually produced in the place where the rivers are deposited, and the quality of jadeite found there is better, why? Because in the place where the rivers are deposited, the jadeite will be harvested with enough water, then the color and transparency are very high when it is mined out, so there is a big difference between the quality of the jadeite and the area where it is formed. The geology gives a good scientific explanation for this. As the jadeite formed in the riverbed, there will be a regular flow of water, so that the water will take away the impurities contained in the process of forming jadeite sand ah, such unclean things, then after the water rinse and refresh, then the jadeite left is almost clear, the color is very distinctive emerald green, transparency is also very high, some people may say jadeite The reason why the jadeite in the riverbed will be so distinct, is completely due to the perennial immersion in the water, it is clear that the jadeite is distinct and transparent and the river wash has a great connection oh. So that the quality of the older jadeite is much better than the new jadeite quality, it is because of this reason.
Old pit kind, new pit kind is one of the jadeite grade moniker, old pit and new pit is actually according to people found, mining jadeite successive years to be divided, then the old pit kind must be "old"? Actually, it is not inevitable.
Misconception 1: Old pit or new pit is the age of the new old
Jadeite has primary and secondary ore, according to experts, the formation of primary ore is due to the geological pressure movement in the mountains, produced in the primary ore of the mountain material jadeite mostly not fine texture, dry to the touch, insufficient head of water. Primary ore deposits have some ore of unequal quality, after the water carrying, some poor quality, impure jadeite will get natural sorting, elimination, and finally retained in the riverbed jadeite after a long time of river water washing, soaking, some minerals into the jade within the material exchange, presenting the mineral color uniformity, head of water enough, texture, structure tight.
In fact, according to the geological point of view, they are formed in the underground geological era is the same, only the mining jadeite successive years are different. "You can't simply judge the age according to the words 'new pit species' and 'old pit species', some new pit species are formed earlier than the old pit species." The expert said.
Myth 2: All old pit varieties are glass and ice varieties
The highest recognition in the market than the old pit glass kind, is the top or the best jade market. Glass kind has a glass luster, its texture is fine and pure without flaws, the color is pure, bright, rich and uniform emerald green old pit kind jadeite is translucent or transparent under the light. Ice jade is slightly worse than the glass, the internal particles visible to the naked eye, take a back seat, but the high ice jade can also be called high-grade products.
Experts said: "Glass, ice belongs to the typical old pit kind, which is determined by its formation conditions, after the washing of water, soaking to leave such a delicate boutique, but the old pit kind does not necessarily reach the level of glass, ice, or there will be a lot of poor quality 'leaky fish ' exists."
So, old pit and new pit is the concept of geography and the state of distribution of the mine, while the new pit and old pit is the concept of jadeite quality. As long as it is high quality, high transparency, fine crystallization of jadeite, is the old pit kind of jadeite. Old pit jadeite is also the most worthy of collectors' attention.
The new variety is also called new pit, new material, and the old variety is also called old pit, old material. There are always many people on the new, old concept of misunderstanding: often think that the new pit, new species, new material, is to refer to the new mining, new processing out of jadeite; old pit, old species, old material is the old time mining and processing of jadeite, in fact, not also. New species refers to the primary mine jadeite, its raw material is new pit without skin stone or mountain stone, these jadeite has no outer skin, rough texture, large crystalline particles, poor moisture (refers to poor transparency), the specific gravity is also slightly light.
Old jadeite refers to secondary ore jadeite, its raw material is water stone or water turned sand stone, these jadeite has outer skin, fine texture, small crystalline particles, water head is sufficient (transparency is good), specific gravity is heavy. So the new species, old species jadeite does not refer to the age of jadeite mining and processing, but refers to the difference in the texture of the jadeite itself. There is another kind of jadeite called New Old Jadeite, which is between Old Jadeite and New Jadeite, its raw material is half mountain and half water stone, and its texture and seeds are also between New Jadeite and Old Jadeite.
The price of old jadeite is much higher than that of new jadeite, meaning that the price of jadeite with fine seeds and high transparency is much higher than that of jadeite with coarse seeds and poor transparency, and this price difference is determined by the material of jadeite itself, while the age of jadeite mining and processing does not have much influence on the price of jadeite. This feature of jadeite is very different from nephrite, and the price of jadeite in the auction market is about ten times higher than that of new jadeite of the same grade, while the price of jadeite in the auction market is only 10 to 50% higher than that of new jadeite of the same grade. So old jadeite new jadeite refers to old work, new work, or old species, new species, must say clearly, not only vaguely old, new.
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