First of all, the jade certificate is not the quality assurance of the stone itself, but a certificate issued by a professional jade appraisal institution or jade appraiser to confirm the authenticity and quality of the stone. Therefore, just because the jade certificate says jade A goods doesn't mean that this stone is real jade.
Secondly, the grade of jadeite is usually judged by color, transparency, texture and cutting. Generally speaking, jadeite is divided into three grades: A, B and C, among which A is considered as the highest grade jadeite. However, this classification is not universal, and different appraisal institutions or appraisers may have different standards. Therefore, even if the jade certificate says jade A goods, the quality of this stone cannot be completely guaranteed.
In addition, there are many fake and shoddy jade products on the market. In order to increase sales, some merchants may write jade A goods on the jade certificate, which is actually low-quality stone. Therefore, the authenticity of the stone cannot be completely guaranteed by the annotation on the jade certificate alone.
The best way to ensure the real jade is to find a reputable jade appraisal institution or appraiser for appraisal. They will judge the authenticity and quality of stones through professional equipment and experience. In addition, understanding the characteristics of jadeite and the credibility of purchasing channels can reduce the risk of buying fakes.
In a word, just because the jade certificate says "Jade A" doesn't mean it is real jade. You need to be cautious when buying jadeite. It is best to find a professional jade appraisal institution or appraiser to identify and understand the characteristics of jade and the credibility of the purchase channel.