Iridium Ore (block)

Iridium ore is a mineral block found in the Overworld, Nether and Purgatory. It's the rarest, and strongest mineral that can be found in the Overworld. Iridium ore requires a diamond pickaxe or better to mine, and it will drop one iridium ore items, which are smelted five at a time to get a  iridium ingot. Iridium ingots can be used to craft tools and armor.

Natural Occurrence
Iridium can spawn in the Overworld, nether and in Purgatory. It's least common in the nether. It spawns at and below layer 24 in the Overworld.

The texture will also be different depending on where it spawns. If it spawns in the nether, it will look like netherrack with white lines on it. If it spawns in the Overworld or Purgatory, it'll a little different than the default ore texture.