Small emerald
From Ancient Anguish Mud Wiki - AAwiki
Can be found in Shieldhand Clan. As the dwarves here were a bit racist, carrying this was a prerequisite for non-dwarves in the area. This has later changed and anyone speaking dwarvish can get in.
When you have entered through the door, go 2e, n then say berserker in dwarvish or whatever, then answer questions yes yes true yes