1. Appearance: Blue and white jade is generally dark green or light green, with bright and bright colors, obvious texture and spots with different shades. The color of jet is dim, mostly black or dark gray, without bright colors. Its surface is smooth and moist, and some jet also has a texture similar to ink.
2. Composition: Blue and white jade is mainly composed of silicate minerals and contains different elements such as chromium, iron and manganese. And the impurities and oxides in it will make it appear different colors and textures. Black jade belongs to silicate jade, because it contains a certain amount of carbon, so its color will be black.
3. Color: The main color of blue and white jade is green, but under the influence of different components and impurities, it will also show different colors such as blue, cyan and grayish green. Black jade is basically black or dark gray, sometimes with tiny gray spots.
4. Texture: Blue and white jade has high hardness, solid texture, is not easy to break, and has certain compressive properties. Jet is delicate and soft, and easy to carve and process.
5. Use: Blue and white jade is often used to make jewelry, ornaments, handicrafts, etc. Because of its bright color and delicate texture, it is widely used in jewelry and collection fields. Black jade is often used to make seals, calligraphy utensils and so on. Its black ink-like texture conforms to the aesthetics of traditional culture and is often used for artistic and cultural inheritance.