From A Wiki in the Desert
Mud Granite is a common, and easy to find, of the Decorative Stone types. It is extracted from the ground with cooperative effort on a Stone Quarry.
To prospect for Mud Granit requires a Perception of at least 2 and Rocks of the Ages
2 needed to build a beetle statue from Test of Khefre's Children
Research and Tuition
Obelisk Construction, Path of the Pilgrim, Skill/Pilgrim Shrine Construction/0, Skill/Structure Maintenance/5, Structure Maintenance, Test of Khefre's Children, Test of the Covered Cartouche, Test of the Empty Hand