Tremair was a very small but valuable gemstone with innate abjurative magical properties. In raw ore, tremair was found as small crystals of pink translucence, and even small gemstones could fetch above a hundred gold pieces in price. Most of Somnum's known tremair reserves were in the dangerous Emberpeak Mountains and in the Spike of Scoria, making the gem an incredibly precious resource.
If worn next to the skin, tremair gems bestowed a resistance to magical minor Curses directed towards the wearer. These powers could be amplified by skilled artisans to provide a greater abjuration against curses.