Ancient Debris

Ancient debris is a rare ore found in the Nether, and is the only source of netherite scrap. It floats on lava in item form and it cannot be burned.

Mineral veins
Ancient debris generate in the Nether in the form of mineral veins. Two veins generate per chunk: one vein of 1–3 ancient debris generates with a periodic Gaussian distribution (similarly to lapis lazuli ore) between levels 8–22, and an additional vein of 1–2 ancient debris generates randomly between levels 7–119. There are up to 5 ancient debris blocks per chunk.

Obtaining
Ancient debris drops as an item if mined by a diamond pickaxe or better. If mined by any other tool, it drops nothing.

Trivia

 * Ancient debris and blocks of netherite are the only blast-resistant blocks that are also moveable by pistons.
 * These two blocks are also two of only three blocks that require at least a diamond pickaxe to mine, the other being obsidian.
 * Ancient debris, along with nether quartz, are the only two ores that can only be found in the Nether.
 * It is the most blast-resistant of all the ores in the game and the only ore that can only be mined with a diamond pickaxe.
 * It is also the only ore in which its name is not based on a real-life mineral.
 * It is one of the 3 ores that drops itself when mined with a non-Silk Touch pickaxe, the others being iron ore and gold ore.