Bayldonite |
John Bayldon (1837((8)) - 1872) discovered this mineral during his lifetime at Penberthy Croft Mine, Cornwall England, United Kingdom, the type locality. The United States boasts Bayldonite in Arazona.
Bayldonite |
The formula is PbCu3(AsO4)2(OH)2. Bayldonite are the green pseudo spheres.