The identification of the jade original stone is mainly to observe the various phenomena appearing on the surface of the weathered crust, and infer the quality of the jade original stone. The following phenomena often appear on the surface of the jade stone!
1. 癣 refers to the appearance of different sizes and shapes on the surface of the jade raw material hull, which is black, dark green or gray! It is a performance characteristic associated with emerald green, and is a provider of chrome ions.癣 eat green or green with black! The main mineral component of 癣 is alkaline hornblende, usually a columnar, fibrous aggregate, indigo, blue-black, often surrounded by pyroxene, especially for jadeite. It is obvious that there is a significant color change with the material around the husk! If there are a large number of flaky enamel on one surface and a large number of punctate enamel on the other surface, the interior may contain too many erectiles, etc. Minerals that produce strontium; if some enamel is expressed on only one surface, and all flaky enamels may have only a little dirt on the surface, it will not have a big impact; if it is on two sides or even three faces When there is a flaw, it may be dirty inside.
2, pine flower refers to the green performance of the jade gambling stone shell, which is a kind of performance inside the jade or shallow green on the surface of the skin! Because the type, concentration and spatial distribution of the coloring ions are in a certain mineralization time and The space is relatively stable, so according to the shade, quantity and shape of the pine flower, it is possible to infer the change and distribution of the color inside the jade! If the color of the pine flower is thick and bright, the value will be high; if there is no jade shell Pine flowers, there may be little color inside; and there are many pine flowers on the skin, there may be color inside or only exist on the surface! In addition, whether the pine flower penetrates into the interior of the jade, the depth of penetration, etc., is also the basis for inferring the color. one.
3. Mist refers to a layer of fog-like opaque material existing between the outer weathering shell and the inner jadeite. It is actually the result of the metamorphism of the jadeite mineral! The primary mineral jadeite occurs due to the decrease of temperature and the increase of pressure. Degenerate, forming new secondary minerals wrapped outside the jadeite, forming a central part of the jadeite, a secondary mineral layer outside, and the outermost layer of weathering crust! These secondary minerals are mainly albite and nepheline The fog is thick and thin, the color is white fog, yellow fog, black fog and red fog! The presence or absence of fog and the color of fog reflect the information of the original rock. The appearance of fog is a sign of green color, different colors. The fog has different indications. The red fog and yellow fog are caused by the high iron content, while the high iron makes the emerald green dark. The white fog indicates that the iron is not high and is a pure jadeite. Out of the green high green.
4. 蟒 is the term used to describe the raw material of jadeite. It refers to the expression of the green band in the jadeite in the weathered crust. It is generally convex and zigzag veins distributed on the surface of the weathering crust, just like a python coil. A basis for the distribution of color and color! The diagenesis and mineralization of jadeite has different generations, forming structural and compositional differences, which leads to different hardnesses and different weathering during weathering! General fine-grained dense structure ratio The coarse-grained loose structure has strong weathering resistance, and the green part has stronger weathering resistance than the colorless part. Therefore, compared with the base of the colorless and light-colored coarse-grained structure, the green part of the fine-grained structure protrudes to form an ankle band! The green strips are mostly the result of post-diagenetic transformation. After the diagenetic period, the first deformation is the deformation and rupture of the jadeite under the stress, and then the hydrothermal intrusion of the colored ions, ion exchange, forming a green band! The colored strips are mostly deformed rupture zones, and this rupture zone continues to wrinkle and recrystallize under the action of stress and hydrothermal fluid, forming a dense curved jadeite structure.
Most of the jade original stone has a weathered crust, that is, the product formed by the weathering of the jade original stone during the geological handling process, called the leather crust! If the crust is rough and has a grainy jade stone, it is called sand stone! The color of sand skin can be divided into: white sand skin, yellow sand skin, iron sand skin, black black sand skin, etc. Among them, white sand skin jade interior often has no color, if there is also light green or purple, but generally good transparency; yellow sand skin There may be more green inside the jade stone, but most of the colors are uneven, and sometimes there may be more intense color roots. It is generally believed that the iron sand skin is thin and the internal quality is good, and the high-grade material can be produced; For the darker black and green, it is generally believed that there will be a deeper green part inside, and even green emeralds may appear. However, the black sandstone jade stone changes very much, and some of them have black spots in the green, and some The inside is very dry green, some inside is very dirty; the lime skin is grayish white, the skin is soft, and the lime skin layer can be brushed off with an iron brush. Most of them are caused by kaolin, and the internal general germplasm is better! In addition, there are also The water is washed, the skin is smooth, the hand feels no sand, and the water stone is very delicate! This skin is very thin, and there are many colors, such as brown, cyan, light yellow, etc.! Because the skin of the water stone is very thin The glare can pass through, it is easier to judge the situation inside! The jadeite of the water pebble is generally transported over a long distance, and the denser and finer parts are retained, so the general quality is better.
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