Gold

Gold is a chemical element with the symbol Au (from Latin: aurum) and an atomic number of 79. It has been a highly sought-after precious metal for coinage, jewelry, and other arts since the beginning of recorded history. The metal occurs as nuggets or grains in rocks, in veins and in alluvial deposits. Gold is dense, soft, shiny and the most malleable and ductile pure metal known. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water.

Gold in the works of Harry Turtledove
Just as gold has been a critical driving force in human history, gold is a driving force in the works of Harry Turtledove, including his alterante history, fantasy, and science fiction. Gold and its acquisition have not been plot points specific to any one work, but general relevance it worth noting in an article.