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. mineral

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by composition
6. inorganic material
7. rock
8. rock by form
9. stone
10. stone by quality
11. gemstone
12. gemstones by specific type

Anotations

Scope note:

Naturally occurring mineral of calcium fluor-phosphate; numerous deposits are found in Germany, Spain and North America. It is colorless when pure, but impurities can give it a white, green (asparagus stone), blue (moroxite), yellow, or violet color. Bones are composed of hydroxyapatite, mixed with protein (ossein) and small amounts of other minerals, such as calcium carbonate. Apatite is commercially used as a fertilizer.