What are Covenant Ships made of!?

In terms of architecture and design comparison between the UNSC and the Covenant ships, and their technology as a whole, I tend to see the covenant having a creative 'Steve Jobs-like' mind

Halo 4 covenant ships, Crs and Rcs Cruisers in Minecraft : r/halo

How To Paint A Covenant Ship for Halo Fleet Battles (brush)

Source Engine : Halo Reach Covenant Ship Corrdiors

RDA-class cruiser by The-Chronothaur on DeviantArt

What are Covenant Ships made of!?

Covenant ship design image - Halo: Fleet Command mod for Nexus: The Jupiter Incident - ModDB

Sins of the Prophets Covenant Let`s Play Part 1 3v3 Non sense

Halo – Top 10 Covenant Ship Classes – Sacred Icon

Warship Build Special — Covenant Fleet, by Francisco Duarte

5 Most Powerful UNSC Ships EVER

Nanolaminate Armour, Halo Fanon

SCALE COMPARISON UNSC/COVENANT SHIPS image - D4RKST0RM99 - IndieDB