Gold Nugget

Gold Nuggets are Vanilla items that can be obtained by killing Pigmen in the Pigman's Den and the Blazing Fortress.

Mobs
Zombie Pigmen drop Gold Nuggets upon death. You can also get them from crafting, as shown below.

Trivia

 * Gold nuggets are commonly used in scams where the scammer puts in money, exits out, and then asks to trade again. Then, the scammer puts in gold nuggets instead of coins and the victim gets scammed.