- | 18c | Beechcraft 1900 | — | — | ||
- | 30c | — | — | |||
- | 40c | — | — | |||
- | 50c | — | — |
- | 18c | barchan dunes | — | — | ||
- | 30c | — | — | |||
- | 40c | Transverse dunes | — | — | ||
- | 50c | Crescent dunes | — | — |
- | 18c | suffrage | — | — | ||
- | 35c | suffrage | — | — | ||
- | 45c | suffrage | — | — | ||
- | 60c | suffrage | — | — |
- | 1c | gypsum | .20 | .20 | ||
- | 2c | fluorite | .20 | .20 | ||
- | 5c | mimetite | .20 | .20 | ||
- | 7c | cuprite | .20 | .20 | ||
- | 10c | azurite | .20 | .20 | ||
X | 18c | boltwoodite | .20 | |||
- | 18c | boltwoodite new formula (1990) | — | — | ||
- | 20c | Dioptase | .20 | |||
- | 25c | — | — | |||
- | 30c | — | — | |||
- | 35c | — | — | |||
- | 40c | diamond | — | — | ||
- | 45c | wulfenite | — | — | ||
- | 50c | — | — | |||
- | 1r | — | — | |||
- | 2r | gold | — | — |
- | 18c | multi | Adenium boehmianum | — | — | |
- | 35c | multi | — | — | ||
- | 45c | multi | — | — | ||
- | 60c | multi | — | — |