Dwarf Rune Stone

A Dwarf Rune Stone is an archaeology keystone. It acts as 12 Dwarf Archaeology Fragments in research on Dwarven archaeology finds that have 'sockets'. They can also be used in Cataclysm dungeons to grant a group wide buff. The buffs available are:


 * Blackrock Caverns: Grants Dark Iron Contingency Plan, which reduces elemental damage done to you by 5 percent
 * Stonecore: Grants Might of the Earthen, which reduces physical damage taken by 5 percent.
 * Grim Batol: Grants Vengeance of the Wildhammer, which is a 5 percent damage increase

Source
Dwarf Rune Stone is an uncommon find when surveying Dwarf archaeology sites.