Gold

Vanilla
See the various pages on the Minecraft Wiki for information on Gold.
 * Gold Ore
 * Gold Ingot
 * Block of Gold
 * Gold Nugget

GregTech
Small Gold Ore can be found at mining level 1, and regular Gold Ore can be found at mining level 2.

Flaxbeard's Steam Power
Flaxbeard's Steam Power only adds the plate variation of the Gold material. The Gold Plate can be created by throwing Gold Ingots into a heated Crucible, and then pouring that molten metal into a Mold with a Plate Mold. Six nuggets are used in the creation of a Plate, which makes it unable to be used in other mod's recipes requiring their own Gold Plates.

Esteemed Innovation
Esteemed Innovation adds the Thin Plate variation of the Gold material. The Thin Gold Plate can be created by melting Gold in a heated Crucible, and then pouring that molten metal into a Mold with a Plate Mold.