Iron Oxide, Fe2O3
Crystal System: Hexagonal
- Hematite is a common mineral with a great diversity of origin. It is found in igneous, metamorphic and sedimentary
rocks. It is formed as sedimentary material through diagenesis of limonite and retains its concretionary
and oolitic forms. Hematite is also found in hydrothermal veins and in the gossans or leached cappings of
base metal deposits. It is the most important ore of iron.
Hematite is rather variable in appearance and sometimes occurs as black rhombohedral crystals arranged
in rosette form (iron roses). It is more frequently found as massive, granular masses with oolitic,
concretionary or botryoidal appearance. Hematite sometimes exhibits iridescent coloration. The presence of
hematite is often responsible for coloring or staining surrounding material red to reddish brown. Hematite
exhibits magnetic properties if heated in a reducing flame.
- Stuart provides the following remarks:
- "This specimen is a modern sculpture-like cluster of mirror-bright, silvery blades of Hematite from Nador, Morocco."
Rocks from Stuart Wilensky's Collection
Index of Specimen Images
Table of Contents