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.
SWAG (silver, wine, art and gold)
SWAG is an asset class comprising silver, wine, art and gold, identified by economist Joe Roseman in his 2011 "Investment Week" article, "SWAG: The Industry's Latest Acronym". He describes these as transportable and easy to store physical assets with no income stream (and so no exposure to income tax) and no incumbent debt, whose performance appears unrelated to the performance of equity markets; and he notes that none of these factors would be affected by sovereign default.