Nether Star

A Nether star is an item that is dropped by the wither upon death. It is used to craft a beacon, and cannot be destroyed with explosions.

Nether stars have the same animated glint as enchanted items and end crystals.

Dropped Nether stars never despawn in Bedrock Edition. In Java Edition, Nether stars dropped by a dying wither despawn after 10 minutes; if dropped by any other means they despawn after 5 minutes like any other item. Nether stars are immune to all explosions, but can still be destroyed by cacti, fire, lava, and the void.