Is it true that Lei Ming Jewelry bought it? Lei Ming jewelry is not all true, because the merchants selling jewelry will attach a jewelry appraisal book, which records the origin, material and expert's appraisal signature of the jewelry, as well as the merchant's watermark. If the jewelry sold by Lei Ming Jewelry meets the above requirements, it is true. Only when you have a jewelry appraisal certificate can you prove that the jewelry you sell is true, and vice versa.