1998: Minerals. A set of eight stamps.
Minerals Represented: Emerald. Missing columbite-tantalite, galena, malachite, cassiterite, ferberite, monazite, and microcline.

1998: Minerals. A set of eight stamps.
Minerals Represented: Emerald. Missing columbite-tantalite, galena, malachite, cassiterite, ferberite, monazite, and microcline.