Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. combination inorganic/organic material
7. combination inorganic/organic animal material
8. [bone and bone components materials]
9. bone (material)
10. [bone by form as material]
11. [tooth and tooth components as materials]
12. [tooth components as material]
13. dentin (material)
14. ivory (material)

Anotations

Scope note:

Ancient ivory originating from the tusks of extinct mammoths, usually from individuals that are 10,000 years old or older, but preserved in frozen environments. Mammoth ivory was formerly abundant in Siberia; it was exported to China and Europe from medieval times.