Costa Rica
| Organization Name | Mineralogy Commission, Costa Rican Geological Society (Comisión de Mineralogía, Colegio de Geólogos de Costa Rica) |
| Address | Naturhistorisches Museum, Mineralogisch-Petrographische Abteilung, Burgring 7, A-1014 Wien, Austria |
| Chair | Guillermo ALVARADO |
| Secretary | Andrés ULLOA-CARMIOL |
| IMA representative | Guillermo ALVARADO |