1, belonging to. Because jade is a kind of jewelry formed under natural conditions, there can be no mixed colors, only white, green, purple and black solid colors. Brown, maroon, grayish green, grayish black and other mixed colors are all secondary colors of jadeite, which are produced by later chemical reactions.

2. Under normal circumstances, maroon jadeite has loose structure, poor transparency and not bright enough color, which belongs to middle and low grade jadeite. The main component to reduce the secondary color is the compound containing Fe2+, which produces gray-green and brown-green jadeite, which is called oil-green species.

3, it is a relatively fixed color, and it is impossible to dissolve it with acid. For example, the colors of white series, purple series, various shades of green series and black series jadeite are all primary colors. Secondary color refers to the color formed under the geological conditions of other provinces.

4. Primary colors are caused by chromogenic ions in the process of jadeite formation. The secondary color is produced by the influence of foreign colored substances after jadeite diagenesis. The primary colors are: green: caused by isomorphic substitution of elements such as chromium, titanium and iron. Purple: colored by manganese. Black: caused by excessive chromium and iron. Secondary color: yellow: caused by limonite infection.

5. The main factors affecting the green ashing of background color are the content of chromogenic metal ions in jadeite, such as chromium forming green and iron oxide forming yellow. The higher the content of chromogenic metal ions, the deeper the color, and the larger the color distribution area of jadeite.