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. glass (material)
8. [glass by composition or origin]

Narrower term/s

• flint glass[+]
  • paste (glass) [+]
    • rhinestone
• crystal (lead glass)

Anotations

Scope note:

Glass containing a high proportion of lead oxide and having a relatively high refractive index, with poor acid resistance and low rigidity; used in many optical components, neon-sign tubing, and light bulbs.