Durvalk
Stone Dwarves live deep underground, rarely encountering humans at all. Whether because they live in remote caverns, their enemies bar them from it, or they simply do not wish to make the effort, stone Dwarves often spend their entire lives apart from nondwarven races. Stone Dwarves live brutal, demanding lives and have less respect for intangible rewards than their cousins nearer to the surface. Stone Dwarves are masterful miners, and their race has delved far and deep below the surface. Here they have often encountered other subterranean races, and they wage a constant war against these evil races. As a result, stone Dwarves have developed a unique fighting style for fighting in small caverns and confined passageways.
No place above the surface is home to the stone Dwarves. They populate large cavern systems under the Grottos, live in huge realms underneath the Dashahn Mountains, and mine deep below the Napalago Hills. Most stone Dwarves worship the Founder, the Earth Mother or the Watcher. The Dark One, while not widely worshiped, is paid sacrifice to stay away and not harm them. The Locust Lord also receives propitiation; hunger is a danger underground.
For alternate stone dwarf statistics, give them darkvision instead of low-light vision, and an alternate skill bonus of +2 Stealth instead of +2 Endurance. Consider replacing Stand Your Ground with a + 1 racial bonus on attacks against dark Elves, troglodytes, mind flayers, and similar subterranean creatures.