Zirconium

Zirconium is a material added by NuclearCraft and Tropicraft.

NuclearCraft
In NuclearCraft, Zirconium Dust is obtained alongside Nether Quartz when breaking Nether Quartz Ore or by crushing Diorite in a Rock Crusher. In its ingot form, Zirconium is used in the crafting of NuclearCraft machines.