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. schist

Anotations

Scope note:

Refers to several groups of greenschist found in the Italian Central Alps which contain carvable soapstone; much used in the Middle Ages as a material for the production of food preparation and storage vessels, and of stoves.