Netherite Ingot

Netherite ingots are crafting materials used to make the strongest-tier tools and armor that are stronger than diamond. Unlike other items, it does not burn in lava.

Obtaining
Netherite ingots are obtained by crafting four netherite scraps and four gold ingots. It is a shapeless recipe, therefore the placement of the netherite scraps and gold ingots does not matter when crafting it.

Crafting ingredient
Note that these pictures are outdated, and that a smithing table is used instead of a crafting table to upgrade items, and that all NBT data is preserved (enchantments, durability, etc.)

Smithing ingredient
Netherite Ingots can be used on a Smithing Table to upgrade diamond items to netherite items.

Repairing
Netherite ingots can be used to repair the following items in an anvil:

Beacons
Netherite ingots can be used to select powers from a beacon. The player must select one of the available powers, and then insert an ingot in the item slot.

A netherite ingot can be substituted for an emerald, a gold ingot, iron ingot, or a diamond. The gold option would consume 3 less gold and no netherite material.

Trivia

 * Netherite ingots are the only crafting material in the game that can upgrade tools, weapons, and gear through crafting.
 * Netherite Ingots are the only crafting material in the game that can craft its respective tools, weapons, or gear from only a single ingot.
 * However, it is used alongside diamond gear and tools to actually craft it.
 * The tools and weapons made from netherite seem to have a small black-colored sprite in their handles, making them the first and only tools and weapons in the game to have this visual feature.