1970 Geology, mineralogy and paleontology issue. Seven fossils, four minerals (dioptase, diamond, muscovite and barite), and one meteorite.
- Issue Date: 31-03-1970
- Designed by: Moura, José
- Printed by: Litografia Maia, Porto
- Print Process: Lithography
- Paper: Polished
- Perforations: 13½
- Format: Sheet of 10×10
