Flaming orange globular Descloizite with silver, sharply pointed, acicular Vanadinite crystals to 1mm. Superb specimen from the late Willard L. Roberts, author of Encyclopedia of Minerals.
Willard Roberts' label - though it erroneously identified as Pyromorphite (it could go both ways really).
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