Gem
Thaumica
Can be molded by the Infestation but remains resistant to it. Location: Cambion Drift (Deimos) from Yellow Mining Lesions, Requiem Obelisks, and Spitia Infested Cysts.
How to get it
Mined from yellow ore lesions in the Cambion Drift (Deimos) with a mining tool bought from Father in the Necralisk.