2. Look at the signature of the appraiser. The appraisal certificate must be signed by two appraisers before it is valid. One is an appraiser and the other is an auditor.
3. Look at this seal. Strictly speaking, it should be a steel seal, and the font on it can be clearly recognized.
4. Look at the numbers. There is the serial number of this certificate on the back of the appraisal certificate, which should be consistent with the serial number posted on the back of the physical object.
Extended data:
Precautions:
1, in the process of wearing at ordinary times, attention should be paid to avoid the contact of jewelry with articles containing chemicals such as acid and alkali in life and in the state of supercooling and overheating. Acids and alkalis corrode metal surfaces.
In addition, it is best not to wear a necklace when doing heavy physical labor and strenuous exercise. Remember to store it separately after taking it off to avoid wearing or winding the necklace.
3, regular cleaning in daily life, common cleaning methods can be washed with water to dry. You can also use neutral cleaning solution or special jewelry cleaning solution to clean the necklace.
4. Send it to the jewelry store for polishing: The necklace needs to be sent to the jewelry store regularly for polishing and fine plating to restore the original luster of the jewelry.
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Baidu encyclopedia-Chow Tai Fook