Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. residue materials
7. corrosion (residue material)

Anotations

Scope note:

A rare light blue corrosion product found as a contributing factor to the greenish chromatic degradation of azurite in mural paintings, and in the patina of outdoor bronze monuments such as the horses of San Marco in Venice.