How to distinguish jade
Jadeite is the top grade in jade. Because of its beautiful color and scarcity, it is widely loved by people. Many jadeites on the market are now produced in Vietnam. It is because of its preciousness that it has also spawned many fake jadeites. How to distinguish jade? How to buy a jadeite that is satisfactory? The following points are for your reference. colour Emerald is jadeite. Hardness 6.5 to 7 (Mohs standard). Many people mistakenly believe that jadeite must be green. In fact, this is a misunderstanding. The green is green and the red is red. Therefore, the words "Cui" and "ç¿¡" have already shown the two main colors of this kind of pyroxene. There are also colors such as cyan, white and purple. The general green jadeite is jade; the red jadeite is called jade jade. The jade jade is often the outer layer of the jade, which is the color of the outer part of the jade that is impregnated with minerals such as iron oxide (often red iron). It is generally distributed under the weathered surface layer, or along the emerald rough fissures, which is a secondary jade. The jade jade is not pure and has many impurities. If you see the appearance is bright and hot, it is mostly artificial dyeing, such as ochre. The so-called ochre is a method of artificial heating and heating, which causes the inner limonite to lose water and transform it into hematite, thereby turning the jadeite into red. To distinguish between natural and ochre jade (ie, red jade), you can use the naked eye or a magnifying glass. Generally speaking, the natural jade is relatively transparent, and the jade color after the color is poor. The dyed jade is slowly infiltrated into the intergranular spaces and fine cracks of the jade because of the dye used. Texture, structure The texture and structure are the so-called "species". Every jadeite has a small crystal composition. The crystal shape, size and arrangement are graded. The smaller the crystal particles, the finer the texture will be, the better the transparency will be, and the better the polishing effect will be. The composition of these crystals in Jadeite is sodium aluminum silicate, which is a monoclinic crystal. Because of its formation, the rock mass has been subjected to high temperature and high pressure for a long time, and the texture becomes dense and subtle. According to research, high pressure is the most important for the formation of jade, so that the crystal is transparent and dense. For this reason, jade jade species are divided into "old pit species", "old pit species" and "new pit species" according to the length of their natural formation process. Among them, "old pit species" is the best. The so-called "fake materials" refer to non-emergency materials of the fake materials, and the more common "materials" are glass frits, pine spices and the like. Generally speaking, the same size of the jewelry, the real jade feels heavier, the fake material is obviously light, especially plastic, more light and fluttering. True jade is jadeite, it has texture in the light, and there is no fake material. Because the hardness is very low, as long as it is rubbed by hand or cloth, the surface of the fake material is easy to fluff, and the surface of the real jade is more smooth and smooth. Under strong light, there are small bubbles in the fake material. If you use a toothpick or a matchstick to clean water, drop the water drops on the polished surface. If it is a fake material, the water drops will spread immediately (except for plastic materials), and the real jade will not spread. In addition, the specific gravity liquid should be used to determine the true and false jade, the jadeite is jadeite, the specific gravity should be 3.33, and the minimum is also between 3.22-3.24, so only 3.32 specific gravity liquid test, the real jade will sink, glass, rosin, plastic Wait for the product to float on the surface. transparency Transparency means “moistureâ€. For this reason, “moisture†is sufficient, that is, transparency is good, clear and transparent, and it looks like “tears are full†or “watery feelingâ€. Moisture can also be measured by the depth and breadth of light that can be penetrated in the crest. 2 points of water is the depth that light can reach in the green material is 2 points, about 6 mm. It is also often referred to as metaphor. The semi-transparent is called glass water, and the semi-transparent is called deuterated water. The jade is fine and the permeability is high. An opaque or low-transparent texture is called anhydrous or water-dried. In addition to the three elements of color, texture and structure, and transparency, jadeite, in addition to any cracks, streaks, black streaks, and collapse of jade in jade jewelry, will affect its collection value, which is another important aspect of appreciation. Poly Rayon Blend,Poly Rayon Fabric,Poly Cotton Rayon Blend,Poly Rayon Spandex Fabric Shaoxing Yuantiao Imp&Exp.,Ltd. , https://www.jeesun-fabric.com