Silver
Silver is a chemical element with symbol Ag (from the Latin "", derived from the Proto-Indo-European "h₂erǵ": "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.
African Union
The emblem of the African Union consists of a gold ribbon bearing small interlocking red rings, from which palm leaves shoot up around an outer gold circle and an inner green circle, within which is a gold representation of Africa. The red interlinked rings stand for African solidarity and the blood shed for the liberation of Africa; the palm leaves for peace; the gold, for Africa's wealth and bright future; the green, for African hopes and aspirations. To symbolise African unity, the silhouette of Africa is drawn without internal borders.