There are many kinds of jewelry, so there are many ways to identify jewelry. Jade can be judged by texture, hardness, emerald, density and color. Diamonds can be distinguished from real diamonds by measuring thermal conductivity data with "thermal conductivity meter". Agate can be identified from the aspects of pattern color, texture, transparency and weight. Jewelry refers to raw materials and semi-finished products of jewelry, jade and precious metals, as well as wearing ornaments, craft ornaments and art collections made of raw materials and semi-finished products of jewelry, jade and precious metals. After just a few years' development, China's jewelry market has jumped from only 1% of the world in previous years to the forefront of the world, second only to the United States and Japan. Jewelry identification method: 1, jade identification ① texture. Natural jadeite is transparent or translucent in texture, and its surface is bright and shiny. If you look closely, you can see the nearly round and slightly transparent "salt particles" and the fibrous substances around them. ② Hardness. Natural jadeite is jadeite, and its Mohs hardness is 7 degrees. It will be carved by a sharp knife without leaving any trace. The hardness of fake jade is low, so a sharp knife can draw it out. 3 Emerald. When natural jadeite is observed under strong light, emeralds with other mineral particles can be seen, which are called Cui Hua or emeralds. Fakes made of glass, plastic and porcelain have no such "emerald" characteristics. ④ Relative density (specific gravity). Natural jadeite has a hard and dense structure, no bubbles, high density, and clear sound when knocking; Fake products have loose structure or bubbles, low density and hoarse knocking sound.