Orange Wulfenite with Mimetite

Wulfenite
Lead Molybdate, PbMoO4

Wulfenite is an uncommon mineral generally considered to be of secondary origin. This mineral forms as crystal aggregates of various colors and is associated with a large number of base metals and other minerals.

Mimetite
Lead Arsenate Chloride, Pb5(AsO4)3Cl

Mimetite is a member of the apatite group. It is a secondary mineral found in the oxidized portions of lead deposits and is typically associated with cerusite, wulfenite, smithsonite, hemimorphite, anglesite, limonite and other oxide zone minerals.

Stuart provides the following remarks:

"This comes from the classic locality for this particular combination of minerals, The San Francisco Mine. These are spectacular gemmy Wulfenite crystals with brilliant orange/red Mimetite balls. This unique locality is now under water and will likely never produce again."


Rocks from Stuart Wilensky's Collection

Index of Specimen Images

Table of Contents

bkeller@rockhounds.com 7/3/95