wulfenite
nounA usually yellow to orange-brown mineral, PbMoO4, used as a molybdenum ore.
nounNative lead molybdate, a mineral of a bright-yellow to orange, red, green, or brown color and resinous to adamantine luster.
nounNative lead molybdate occurring in tetragonal crystals, usually tabular, and of a bright orange-yellow to red, gray, or brown color; — also called
An orange
a yellow to orange or brown mineral used as a molybdenum ore