The meaning of jadeite grade A is different from our usual meaning. Nowadays, the technology of counterfeiting is getting higher and higher, and many big brands are plagiarized, so the products produced in this way are called A goods. Therefore, many people will misunderstand whether jadeite grade A is also bad. In fact, it is not: "A goods: jadeite A goods refer to jadeite that exists naturally, and it is only carved, polished and polished by physical methods, without using any chemical or irradiation methods to improve its internal structure." -Quoted from Baidu Encyclopedia. So it's best to buy jadeite with A-level certificate.
Then there must be Grade A, Grade B and Grade C, which is not difficult to understand. There are too few pure natural jadeites with good quality. Therefore, artificially burned and dyed jadeite will naturally exist: "B goods: pickling, bleaching and glue injection. C goods: dyeing treatment. Used for jadeite dyeing. Whether it is acid leaching bleaching or not, whether it is filled with glue, all artificially colored jadeites are called C goods. " -Quoted from Baidu Encyclopedia. These processed jadeites are of low value and can be easily used for counterfeiting.
If the quality of grade A jadeite is good, then the price is only high or not. If you want a good jade, then the appraisal certificate, water planting and carving are all extra points, but laymen are easily deceived, so don't worry when you meet a good jade, and it's not too late to confirm its naturalness before buying it.