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

Narrower term/s

• plagioclase[+]
  • albite
• alkali feldspar[+]
  • microcline
  • orthoclase [+]
    • moonstone
  • sanidine
  • anorthoclase
• anorthite

Anotations

Scope note:

General name for a large group of aluminum silicate minerals, usually white or flesh-red in color, occurring in crystals or in crystalline masses. Feldspars are divided into three primary groups: potassium aluminum silicates (orthoclase, microcline), sodium aluminum silicates (albite, anorthoclase), and calcium aluminum silicates (anorthite). A few of the feldspars are found as gemstones such as moonstone, sunstone, and Amazon stone, but most are found in mineral structures, such as granite and diorite. They are used in the production of clays, ceramics, glass, concrete, abrasives, for cleaning, as a flux in ceramics, glazes, and glass, in fertilizer, and in granular roofing material.