query: What does the symbol for silver Ag come from?
passage: Silver
Silver is a chemical element with symbol Ag (from the Latin argentum, 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.
passage: Seal of Pereira
The shield symbolizes the two terms that form the pre-colonial times and the current city. The golden frog symbolizes the Quimbaya culture, it seems that this was the sacred animal of the culture, representing fertility and agility. The sun and the two half crowns Counts were taken in part from the old shield of ancient Carthage, which was awarded to "Robledo City" by the Emperor Charles V.