Orange Wulfenite Crystals
|Orange Wulfenite Crystals. Credit: Spirifer Minerals|
Nice spicimen reach in yellow/orange and translucent wulfenite crystals on mimetite matrix.
Formula: , PbMoO4
Colour: Orange-yellow, yellow, ...
Lustre: Adamantine, Sub-Adamantine, Resinous
Hardness: 2½ - 3
From: San Francisco mine,Cerro Negro,Sonora, Mexico
Wulfenite was first described in 1845 for an occurrence in Bad Bleiberg, Carinthia, Austria. It was named for Franz Xavier von Wulfen (1728–1805), an Austrian mineralogist.
Wulfenite, lead molybdate, PbMoO4, a minor source of molybdenum and the second most common molybdenum mineral. It occurs in the oxidized zone of lead and molybdenum deposits. It can be most often found as thin tabular crystals with a bright orange-red to yellow-orange color, sometimes brown, although the color can be highly variable. In its yellow form it is sometimes called "yellow lead ore".