(1) bleached jade (grade b jade). It is to remove the variegated colors (such as grayish yellow and grayish black) in jadeite with strong acid to make the main color more vivid, such as "jadeite with white background". Due to acid treatment, its internal structure was greatly destroyed, and its texture became worse and more brittle.
(2) Dyed jade (Grade C jade). Colorless jadeite is indirectly heated. After the pores in jadeite are enlarged, it is put into dye solution for coloring. It must be heated and dyed repeatedly for more than ten times to obtain the effect of colored jade. * * * The jade material used must be hard, and there will be no cracks due to the cold and hot process.
(3) Electro-colored jade (Grade C jade). Inferior jade is plated with a layer of color appearance through electroplating process, which must be carefully observed to distinguish it. If there are some small green cracks with blue on the jade, it means electrochromic jade. Because electroplating will leave cracks, which are called "spider claws" and can be observed with a magnifying glass.
But it can't be said that this piece of jade is A goods, which means it is a good jade. Only refers to the original jadeite stone that has not been bleached, faded and dyed. It is possible that some jade is not very good in texture, but it can also be called A goods without any bleaching or dyeing. Therefore, A goods are not the only condition for identifying good jade.