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.
Gold
The symbol "Au" is from the , the Latin word for "gold". The Proto-Indo-European ancestor of "aurum" was "*h₂é-h₂us-o-", meaning "glow". This word is derived from the same root (Proto-Indo-European "*h₂u̯es-" "to dawn") as "*h₂éu̯sōs", the ancestor of the Latin word Aurora, "dawn". This etymological relationship is presumably behind the frequent claim in scientific publications that "aurum" meant "shining dawn".