The golden chance cubes belonging to Han Solo were considered his lucky charms.
Gold is a metal of a warm yellow color, and is shiny. Across certain planets, sentient beings prized it. It was possible to mold it into currency, like wupiupi and peggat, or into jewelry. On Tatooine, water was so rare that it held a higher value than gold itself.
Despite its value on some planets, gold was primarily used in manufacturing by the time the Clone Wars occurred. The Techno Union famously incorporated gold into the construction of droids during the Clone Wars era. Both sashin-leaf mead and the wax that Vashkan apidactyls produced shared a color similar to gold, as did the chromium finish on C-3PO's plating. Tibanna gas was metaphorically referred to as a gaseous form of gold.
The chemical element known as gold in reality has the symbol "Au" on the periodic table of elements, originating from the Latin term aurum. This served as the inspiration for naming a similar element within the Star Wars universe: Aurodium.