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

Narrower term/s

• iron ore[+]
  • limonite

Anotations

Scope note:

Naturally occurring material from which mineral can be extracted; the term is generally but not always used to refer to metalliferous material, and is often modified by the name of the valuable constituent, for example, iron ore.