A Secondary Lead Mineral of the Apatite Group
Vanadinite is a secondary lead mineral species with the chemical formula Pb5(VO4)3Cl. This vanadinite mineral belongs to the apatite group and crystallizes in the hexagonal crystal system. It forms in the oxidation zones of lead deposits, commonly through the alteration of primary minerals such as galena.
The vanadinite specimens currently available in our mineral catalogue are displayed below.
Vanadinite crystals typically develop as short hexagonal prisms, with a clearly defined six-sided cross section. This distinctive crystal habit makes vanadinite easily recognizable among mineral collectors and enthusiasts.
Color, Luster and Crystal Habit
Vanadinite is best known for its red to reddish-brown tones, sometimes showing subtle orange shades. The luster of a vanadinite specimen is generally described as resinous to sub-adamantine, depending on surface condition and crystal quality.
- Crystal habit: short hexagonal prisms, often forming compact groups
- Surface definition: flat faces and well-marked edges
- Presentation: isolated crystals or clustered growth, with a clear visual separation between crystals and their matrix depending on the specimen
Crystal size in vanadinite specimens may range from a few millimeters to several centimeters, depending on growth conditions within mineralized cavities.
Origin: Moroccan Vanadinite from Mibladen
The most widely recognized vanadinite specimens come from Morocco, particularly from the mining district of Mibladen in the Midelt Province. Moroccan vanadinite is well represented in mineral collections due to the frequent occurrence of well-formed crystals and clearly defined hexagonal morphology.
Specimens from Mibladen are often sought after by mineral collectors for their distinct crystal habit and readable structure.
Common Mineral Associations
In oxidized lead deposits, vanadinite mineral specimens may occur alongside other minerals typical of this geological environment, including:
- altered galena
- baryte
- limonite
- various iron oxides
Key Aspects to Observe When Evaluating a Vanadinite Specimen
- Crystal definition: clearly identifiable hexagonal cross section and well-separated crystals
- Structural regularity: visually clean faces and sharp edges
- Color quality: consistent tone or natural zoning when present
- Condition: limited chipping, with crystal terminations generally well preserved
