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 technique]
9. art glass (material)

Anotations

Scope note:

Term used in the glass trade for uncased art glass developed by the New England Glass Company in 1883, which varies in shading from light amber to deep ruby, the ruby areas result when part of the glass is reheated and the gold particles in the glass develop a ruby color.