From D&D Wiki
Kardin are beings of living stone and are always shades of gray, are 6' 5" to 7' 5" feet tall, and 500 pounds to 1 ton. Kardin have natural armor and are said to be closely related to the Dwarves in the sense that the Dwarves at one point might have been living rock as well. Rather than aging Kardin sort of rust and crumble away. Kardin usually look like larger versions of Dwarves and just like regular creatures they grow "hair" or at least stone that looks like hair. They can cut it with chisels, but most just let it grow out. Beards are very common.
+2 Constitution, +2 Strength, -2 Dexterity
Kardin have a base land speed of 35
+2 racial bonus on Bluff, Endurance, and Intimidate checks.
+2 racial bonus on Fortitude saves.
+1 racial bonus on attack rolls with Two-Handed Weapons
-2 on Arcana checks
Automatic Languages: Common, Giant, Dwarven. Bonus Languages: Terran,
Stoneskinned: Kardin have natural armor giving them +6 to AC, They have 100% poison resistance, but cannot wear armor and have -5 to Nature Resistance.
Freeze: A Kardin can hold itself so still it appears to be a statue. An observer must succeed on a DC 20 Spot check to notice the Kardin is really alive.
Favored Class: Barbarian