Pd990 requires that the palladium content should not be less than 990‰, and it can be identified as Pd990 or Pd 990. Palladium jewelry with a palladium content of not less than 750‰ and 500‰ is mainly used for inlaying. It is not allowed to call palladium ornaments "palladium platinum ornaments" or "palladium platinum ornaments" and other ambiguous names. In addition, the standard also requires that the weight of precious metal jewelry should be kept to two decimal places, and the negative deviation of the weight of a single jewelry with a weight less than 100 g should not be greater than 0.0 1 g.