1, the front of the jade bracelet identification certificate: it is the issuing unit, and the testing institution can be the quality inspection station under the provincial quality supervision bureau, or the quality inspection station under the municipal quality supervision bureau. Some colleges and universities offering jewelry majors are also eligible to issue appraisal certificates. A jade bracelet corresponds to an appraisal certificate, and the copy of the certificate is invalid (even if it is stamped with the official seal); The appraisal certificate is also invalid after being altered or deleted.

2. On the back of the jade bracelet identification certificate, there are various physical and chemical characteristics of the jade bracelet. Note: weight of jade bracelet: take g (gram) as the unit, accurate to two decimal places. Shape and color: subject to the real photo, the color of the photo will occasionally deviate. Test basis: GB, short for "National Standard". Refractive index: measured by refractometer, generally around 1.66. Density: usually 3.33 g/cm3. Absorption spectrum: observed by spectroscope, all A goods are 437 absorption lines. Magnification inspection: fiber interwoven structure can be seen under the gem microscope (no filling and dyeing phenomenon). Telephone inquiry: you can call the telephone number on the certificate to inquire about the authenticity of the certificate.