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.
Soldier Support Institute
Symbolism – The green background represents the green of the countryside near Fort Benjamin Harrison, Indiana, the original location of the organization. The torch and heneage knot are adapted from the shoulder-sleeve insignia of the original unit's parent organization at the time the insignia was adopted, the U.S. Army Administrative Schools Center. Gold and silver represent the enduring value of the knowledge imparted by the schools that comprise the Institute. The two white stars are symbolic of guidance and leadership. The Latin motto means instructing or "Teaching the Soldier".