Dwarven Ring of Dwálin's Tribe

The Ring of Dwálin the wise's House was given in secret to Brúni, who initially did not knew the gift came from Sauron.The Ring pas passed on by Brúni to his heirs until the fall of Barazbizar when the dwarven Mine was delivered by treason to the Witch-King who returned it to his Master Sauron.