Nether Gold Ore

Nether gold ore is a variant of gold ore found only in the Nether.

Mineral veins
Nether gold ore generates in the Nether in the form of mineral veins. Nether gold ore attempts to generate 10 times per chunk in veins of size 10, from altitudes 10 to 117, in all applicable biomes.

From block loot
Nether gold ore drops gold nuggets when mined with any pickaxe, and as such Silk Touch is required to obtain nether gold ore in its block form.

Block loot
Nether gold ore drops 2-6 gold nuggets when mined with any pickaxe, with the drops having a chance to be increased by Fortune.

Trivia

 * In 2017, Jeb showed interest in a suggestion regarding nether gold ore that was posted on Reddit.