This is an old Arkenstone and Leithauser collection specimen. The largest crystal perched at the top is 1.3cm and is aside an equally large crystal. There are many other crystals at the bass.
Vanadinite
Formula
Pb5(VO4)3Cl
Crystal System
Hexagonal
Crystal Habit
Globular, Prismatic, Nodular
Cleavage
None, None, None
Luster
Adamantine
Color
brown, brownish yellow, brown red, colorless, yellow