According to the traditional jadeite market standard, the jadeite density of 4.0 may not match the real jadeite grade, and it may be a fake. Emerald A refers to pure natural jadeite with a density of 3.3-3.4, which has not been artificially treated and its internal structure has not changed. Usually, 3.33 will be marked on the jade appraisal book, which is also an important basis for distinguishing true and false jade.

However, high-density jadeite gems cannot be simply classified as A goods, because if jadeite is artificially treated, such as filling and dyeing, although its density may increase, the overall quality of jadeite may also be affected.

Therefore, we should not only rely on the index of density to identify the authenticity of jadeite, but also comprehensively evaluate the color, transparency and texture of jadeite. If you still have doubts about the authenticity of jade, you can seek the help of professional jewelry appraisal institutions.