The current Ayatollah of Iran

Ali Khameini

Nice ring, doncha think?

Rear Admiral Alireza Tangsiri of the IRGC

Commander Yahya Rahim Safevi of the IRGC

Hezbollah leader

The first one is 2019

The second is 2013

The stone seems to say he used to be an archbishop but sometime in the past 6 years he was promoted to cardinal.

Based on these rank descriptions:

Can be decorated with precious stones, as tradition dictates, sometimes enriched with gems: the type of stone symbolizes the degree of the priest wearing it (sapphire or ruby ​​for the Cardinal, yellow topaz for the archbishop; amethyst for the bishop).

https://www.holyart.com/blog/church-supplies/symbolic-value-bishop-rings/

The theory is that these 3 ranks correspond to the 3 core degrees of freemasonry and two the 3 zones in Egyptian and Hebrew temples.

1st degree gets only into Peristyle Courtyard

2nd degree can pass into Hippostyle

3rd degree can enter the Sanctuary or Holy of Holies

You can see this same layout in Herod's temple. 1st Degree courtyard is closest half, the 2nd degree courtyard is the furthest half, and the 3rd degree sanctuary is the small building with roof and it's own doors.

Compare to an Orthodox christian church, the kind that has a wall with a door, between the communion area, and the altar.