Gold Ore

Gold Ore is an early game ore, which spawns in the Underground and Cavern biomes, as well as on Floating Islands. Its primary use is to make Gold Bars, which can be used to make the Gold tier of equipment, as well as crowns, Thrones, and several other items. The equivalent of Gold Ore is Platinum Ore, which will sometimes replace Gold on a world. The hardmode ore that will spawn in your world when you have Gold will be Titanium.

Trivia

 * In real life, gold is one of the softest metals, but in Terraria (as lampshaded by the Goblin Tinkerer) it is harder than such heavy-duty metals as iron or steel.
 * Additionally, real gold ore does not exist; gold is only found in its native form, and any compounds of gold are artificial and require complex processes to make. Most are also unstable.

History
Minerai d'or Gold Ore Золотая руда