Mineral Stamps from Australia December 12, 2024 Pendleton Uncategorised 1973 Marine Life and Gemstones. Full set details here. Minerals represented: Chrysoprase, agate, opal, and rhodonite. 1974 Marine Life and Gemstones. Full set details here. Mineral represented: Corundum (sapphire). 1995 Opals series. Minerals represented: Black opal.
