The Dwarven Marriage Ring is a rare item very similar to the Hobbit ring, and is used to perform Dwarven marriages. These rings may be bought from Blue Mountains merchants and Iron Hills merchants. Both the Dwarves of the Iron Hills and the Dwarves of the Blue Mountains use this ring. Two Dwarves from different factions may not marry, however. The same goes for two Dwarves with the same father (implies that they come from the same family).