2018: Minerals. Agency issue.
A postal administration may allow a third-party agency to issue stamps on its behalf. When the vast majority of issued stamps are sold directly by the agency to the philatelic market rather than used in the postal system, they may be referred to as “Agency Issue”. They are rarely found on everyday mail.
Minerals Represented: Red beryl, demantoid garnet, ilmenite, and heliodor.
