Wulfenite

[wulfәnait]

Definition

(noun.) a yellow to orange or brown mineral used as a molybdenum ore.

Inputed by Frances--From WordNet

Definition

(n.) Native lead molybdate occurring in tetragonal crystals, usually tabular, and of a bright orange-yellow to red, gray, or brown color; -- also called yellow lead ore.

Inputed by Jarvis