: Focus on high-purity (.999+) bars and government coins to keep premiums low.
: Produced by sovereign mints (e.g., U.S. Mint , Royal Canadian Mint ). They have a legal tender face value and are the most liquid but often carry the highest "premium" (markup over the spot price).
: Rectangular pieces stamped with weight and purity. They offer lower premiums than coins and are ideal for accumulating large quantities of metal.