It is hard to see in the photos, but this specimen is hollow through the center. It is much like a crown full of black, very lustrous, 1-3mm Descloizite crystals.
Descloizite
Formula
PbZnVO4(OH)
Crystal System
Orthorhombic
Crystal Habit
Plumose, Tabular, Encrustations
Cleavage
None, None, None
Luster
Greasy (Oily)
Color
dark brownish black, dark reddish brown, orange red, reddish brown, black