Ayardium is the rarest of rare minerals, obtainable not from mining salvage but only awarded upon completion of all talismans of the Elder Gods talisman set. Consuming ayardium bestows a random rare mineral bonus for a third of a day (or 20 minutes [22 minutes for Tash'la in that other context]). Ayardium itself is a consumable artefact, miraculously resetting itself back to its owner for fresh consumption after two days.