Durnaur has a number of crafting uses on the Morgul crafting table, including making Orc torches, which then can be used to ignite bombs. Also, crafting nine together on a vanilla crafting table gives you a Durnaur block.
Durnaur can be sold to Mordor Orc traders for a small amount of silver coins. In addition, Durnaur can be alloyed with Orc Steel ingots or Morgul Iron ore to produce Black Uruk Steel. Due to this, Durnaur gems are thus a very useful resource for all players in the Mordor faction.
Origin of the name Edit
Although Durnaur is a non-canon addition and does not appear in Tolkien's work, the name is in Sindarin, one of the Elvish languages. Dur means "dark" in Sindarin, and naur means "fire". The end result is Durnaur, which stands for "dark fire", due to the red-orange color of the gems and the dark land where it is found.
Prior to Public Beta 30 it was called "Naurite".