Adamantia

One of the first Dwarven nations and a region south of Ilithi, connecting the Kermoria and Albaria continents. It spanned the Hiimarhand Shel mountains and its capital was HighHold. Unlike the other Dwarven nations, Adamantia never became part of the Seven Star Empire. It is now overrun by the demon forest Dark Hand.

The other ancestral Dwarven kingdoms were: Iron Clan, Rendstone and Kwarlog.
Also see A Tale of HighHold (book).