1961: Country Motives. A set of seven stamps, four of which are relevant, diamond (below), heliodor, tourmaline, and topaz.
Minerals Represented: Diamond.
1989: Minerals and Mining.
Set of 15 stamps, ten minerals and five mining. The stamps are the same as the Namibia set, except with SWA.
Minerals Represented: Gypsum, fluorite, mimetite, azurite, dioptase, diamond, boltwoodite, wulfenite, gold, and willemite.
