Stone Golems are of intermediate power, behind iron and adamantite golems but ahead of clay and flesh golems . Only +2 or greater enchanted weapons can harm them, and they are mostly magic resistant (Dragon's Breath or Comet might affect them).  Some can be found in Lavok's Sphere, in the Windspear Hills dungeon, guarding Adalon's eggs in the temple in Ust Natha, and in the elven city of Suldanessellar.