Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by function]
6. colorant (material)
7. pigments
8. [pigment by color]
9. violet pigment
10. synthetic inorganic violet pigment

Anotations

Scope note:

Permanent purple pigment historically used to make ruby glass and to create vitreous ceramic glazes used in painting, porcelain, and coloring enamels. It is synthesized by precipitating fine gold particles onto tin oxide particles. Adding potassium carbonate to the solution deepens the purple hue. The pigment is named for Andreas Cassius who first made it in 1676. It was largely replaced in the 19th century by the less costly equivalent cobalt violet.