Name | Issues/Designs | |||
bismuthinite | — | — | d - Oruro Technical University emblem, Cassiterite, Sulfur, bismuthinite 1992 | |
Cassiterite | — | — | d - Oruro Technical University emblem, Cassiterite, Sulfur, bismuthinite 1992 | |
Sulfur | — | — | d - Oruro Technical University emblem, Cassiterite, Sulfur, bismuthinite 1992 |