Weapon used by the ancient elves. During the "coming of age ceremony", elves who left Idisil were guided by the Holymental and came all the way to Crag mine. It is assumed that they dropped it while they were slaugtered by the Halostone Keeper. It is highly eroded in the halomental wave, so if it is out of the keeper's body and contact the outside air, it will rapidly oxidize.
