Gold is a metal added by vanilla Minecraft. It can be obtained from Gold Ore and, less commonly, Copper Ore. Thermal Foundation adds a two items made of this metal: Pulverized Gold and Gold Gears.
Gold Ore and Copper Ore can also be processed in various ways in an Induction Smelter, with varying byproducts.
Gold is commonly used as a simple crafting material. The metal can also be combined with Silver to create the alloy Electrum.