Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. biological material
7. animal material
8. keratinous material
9. beak (material)

Anotations

Scope note:

Yellowish white ornamental material with a vibrant, brownish-red coating traditionally used for carving in China and other Asian countries. It is derived from the solid keratin casque atop the beak of the helmeted hornbill (Rhinoplax vigil).