Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. rock (inorganic material)
8. metamorphic rock
9. marble (rock)
10. [marble by color or pattern]
11. variegated marble

Anotations

Scope note:

A purplish red and white clouded stone which may come from either the island of Iasus or the island of Chios. It was supposedly favored by the emperor Claudius in antiquity and was later used in the door jambs of the Porta Santa of St. Peter's in Rome, hence its name.