Veradnium

Used by the Covenant for numerous purposes for millennia, this alloy was what composed the majority of Covenant armor.

History
Used by the San'Shyuum since before the First age of Reconciliation, and by the whole of the Covenant after, this alloy saw innumerable millennia of active use for Covenant ship and vehicle use, it was able to withstand a bombardment of the UNSC's primitive Archer missiles much better than the UNSC titanium battle-plating but was still susceptible to plasma and heavy energy weapons. Two decades after the end of the Great War, the Sangheili allied with the humans, teaching them what the alloy was with the help of numerous Huragok, and thus gave them limited manufacturing capabilities of Veradnium, which they mainly used on orbital weapons platforms and for improved structural support in ships.