If it is a thick ring, it is generally normal within 20 yuan.
If it is Banzhi, generally speaking, the quality is less than 100 yuan.
However, if it is the pulling material of south red agate and Ma chalcedony, it ranges from several hundred yuan to several thousand yuan according to different varieties.
If it is an agate ring inlaid with S925, it will generally cost several hundred yuan.
However, if it is a southern red ring inlaid with S925, a few hundred yuan is normal.
If it is a south red ring inlaid with K gold, there are several thousand yuan and tens of thousands of yuan.
For reference only, please adopt it.
Good luck!