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. mineral

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by composition
6. inorganic material
7. metal
8. metal by composition or origin
9. nonferrous metal
10. lead, lead isotopes, compounds, alloys
11. lead compounds

Anotations

Scope note:

A rare lead compound, a transparent to pale white mineral in the monoclinic system. It was first identified in the lead-antimony vein at the southwestern end of Bounds Cliff, Cornwall by Cornish mineral collector Richard A. Barstow. It has also been found as a corrosion product on lead artifacts.