Auramite is an incredibly rare substance, whose natural colouration is a shining gold, a hue entirely appropriate for the Emperor's personal guardians. However, through closely guarded alchemical processes, auramite can be tinted, or its colour changed altogether on a molecular level. It is a costly and painstaking process, but considered far more suited to the Custodians' importance than simple repainting.
- 1: Master of Mankind (Novel) Chapter 3
- 2: The First Heretic (Novel) Chapter 7
- 3: Codex: Adeptus Custodes (8th Edition), pg. 22, The Shadowkeepers