The Unique Ring of Dariush Menhetkin is a 3351 years old piece made by Dariush Menhetkin, a jeweler living in Isfahan.
Considering its age and the quality of the work, people consider it of priceless value.
It is engraved with central asian patterns and some symbols pertaining to Yazdanism.
This piece doesn't exist, but as a legend. It is said that in the year -697, Charlotte Menhetkin, the owner, made use of it in Jerusalem to empower the Menhetkin family. Now it is lost, or broken, we will never know.