Indiana University
Indiana Univ. Bloomington:geo Notes: Salem Limestone: Carving and Sculpture [Pdf]
Describes Salem Limestone, a high-quality limestone, and its use by stone carvers to create intricate and detailed sculptures.
Khan Academy
Khan Academy: Ambum Stone
The Ambum Stone is prized above all others not only for its age-it is one of the oldest of all sculptures made in Oceania-but also for its highly detailed sculptural qualities. View pictures and read about the history and mysteries...
California State University
Lesson Plan: Pictograph Stone Carving
This lesson plan provides a fun art activity about stone carving.