Identification of jadeite depends on hardness, transparency, color, luster and spots. Real jade is very hard and wear-resistant, crystal clear, pure and beautiful in color and sparkling. If you can see cracks, fibrous cotton threads or dark wounds in jade, it is inferior jade. All fake jade has wrinkles on the surface and bubbles inside, which is light in weight and low in hardness, and the sound is crisp when knocking each other. Identify the quality of jade. There are six standards, namely "color, transparency, uniformity, shape, percussion and luster", which are more detailed than the only "color, transparency, uniformity and shape" of the Anglo-American Jewelry Association. Under different circumstances, people's understanding of the meaning of jade is quite different. Jade in a narrow sense refers to jadeite and nephrite; Jade in a broad sense should also include many minerals and rocks used for handicraft carving, such as xiuyan jade, Jasper and Qingtian Stone. In Chinese jewelry industry, jadeite is often called jadeite (which will be introduced later). Jade also belongs to nephrite in mineralogy, which is a hydrated calcium magnesium silicate. Jadeite has a hardness of 5-6, a density of 2.9-3. 1g per cubic centimeter, serrated fracture, oily luster, translucent to opaque. Jade has many colors, including white, blue, green, black, gray, yellow and red. White and delicate jade is called suet jade, which is the most precious variety of jade. In addition, according to the color of jade, the types of jade are white jade, topaz (topaz), sapphire, jasper and jet. Jade occupies an important position in Chinese jewelry culture. Guanzi said: "A gentleman is better than jade" and personified jade. In modern life, jade is still loved by people, especially women. Distinguish the quality of jade according to its color, quality and quality. Whether it is white jade, topaz, sapphire or jasper, its jade color must be bright, and the best is not evil or gray. As far as jade and jade are concerned, it is required to be delicate and white, pure and free from impurities. No matter what color of Baoyu is, the finer the quality, the better, and the finer the moisture. Jade jewelry is suitable for people of all personalities and ages. Whether it is a beautiful young girl or a graceful young woman, wearing a sparkling diamond necklace with pure and shiny Baoyu earrings or bracelets will look radiant. Identification of jade is mainly to prevent nitrate from acting as white jade. It can be identified from the aspects of color, jade, fracture, impurity, specific gravity and sound. 1. color: the white of white jade is often slightly blue, and few people are extremely white and pure white, while nitrate is even white and pure white. After the light is on, nitrate still has a slight orange light. 2. Jade: One of the characteristics of jade is that it is moist and even, like cream. Although the feeling of nitrate is bright and naked, it feels like a thief's light flashing in the bright and moist. 3. Fracture: This is an obvious feature. The fracture of white jade is stony, dull, serrated or serrated, while the fracture of nitrate is material, bright and shiny, and shell-shaped. Although jewelry appraisal can't be destructive, it can be observed through some accidental bumps, unpolished grinding surfaces and corners. 4. Impurities: There are no bubbles in jadeite, but there are bubbles in nitrate. Sometimes it is difficult to be observed because of its translucent color, and sometimes it is rare because of its good quality. But as an appraisal, you can't stop without finding evidence. Sometimes we can check from the surface. If there is trachoma, that is, there are bubbles on the surface, it can also be proved to be nitrate, because white jade does not have this characteristic, and the bubbles inside can also be checked under strong light. 5. Specific gravity: the specific gravity of jade is between 2.9-3. 1, and nitrate is about 2.5, which is lighter than nitrate. 6. Voice: The voice of jade is dignified, and the voice of nitrate is crisp. In some cases, it can be identified by the sound difference between jade and nitrate through a gentle impact. There are many kinds of jade ornaments. One is to see the color of jade. Even if it is the same, the texture and color of different parts are different. Jade is colorful. It belongs to monochrome, so you need to choose one with uniform chromaticity. If there are shades on the same piece of jade, it is required that the tone lines are beautiful and natural. The second is to look at the texture of jade. It is best to be pure, smooth and crystal clear, and there can be no dirty spots or chaff and dryness. Emerald often has wrinkles, that is, broken lines with different depths and lengths, which are inferior. Third, look at the workmanship. Jade should be polished with diamonds or emery. Rough trade unions make the surface of jade have friction marks and have no luster. Good workmanship should be neat and shiny. If jade is embedded in gold and silver jewelry, it depends on whether it is firm, geometric and harmonious.