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. metal
8. [metal by composition or origin]
9. nonferrous metal
10. [copper and copper alloy]
11. copper alloy
12. bronze (metal)

Anotations

Scope note:

A patinated alloy of copper with varying amounts of gold and silver, said to have been developed in Corinth in the second century BCE, and highly valued for ornament and statues. Objects cast from the metal were subjected to a heating and quenching process that resulted in a lustrous purple-black patina resistant to tarnishing.