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 (material)

Anotations

Scope note:

General term for material made from tusks, which are large protruding teeth found in elephants, walruses, narwhals, and boars. Tusks, like other teeth, have a soft center surrounded by hard dentin primarily composed of calcium hydroxyapatite with smaller amounts of calcium carbonate, calcium fluoride, magnesium phosphate, and ossein. A hard durable enamel forms a smooth outer surface. Tusk has been used to make sculptures, handles, and other items.