The value of jewelry is judged by its color and product, so the jewelry in the Forbidden City is not particularly valuable according to this standard. Therefore, the quality of the jewels in the Forbidden City is average, even inferior to the precious jewels in the auction. Because some jewels are just collected and played by noble families, or given by others, they may not be valuable.
But the jewels in the Forbidden City are actually very precious because of its historicity. After all, I have been in the Forbidden City for so many years. Although it is lifeless, it has witnessed many historical events. So these jewels are placed in the Forbidden City, not at the level of jewels, but at the level of cultural relics. So his value lies in the value of cultural relics, not as ordinary jewelry. The jewels in the Forbidden City are actually things like blue and white porcelain, not that kind of jewelry market. Therefore, the jewels in the Forbidden City are still very valuable, even if their luster and color are average.
Moreover, the reputation of the Forbidden City is very loud, and it can be said that everyone knows it. So its fame deepened the value of jewelry. After all, the well-known cultural relics are actually more valuable. Therefore, the jewelry of the Forbidden City has always been a free ride, and it has increased in value with the reputation of the Forbidden City.
And because the appreciation level at that time was different from today's, the jewelry that used to look good may have depreciated a lot now. Jewelry used to be different in color, but it may have been really valuable in the past. So today's appreciation level also determines today's jewelry value.