DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
The mineral Wulfenite is a lead molybdate with the formula PbMoO4. It usually occurs as thin tabular crystals of bright, orange-red colour, sometimes brown or yellowish. Its crystal system is tetragonal, with the habitat varying from pyramidal to tabular crystals. It is found as a secondary mineral associated with the oxidized zone of lead deposits (galena) as well as with traces of cerussite, hydrocerussite, pyromorphite and other minerals.The sample here displayed is from a renowned location in the Sierra Los Lamentos, near Chihuahua in Mexico. The tabular, orange red crystals of wulfenite reside on a substrate of pure white calcite. Individual crystals measure between 5 to 15 mm.
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