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Id 14
Identification Type Mineral
Name Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Distinguishing Features Translucent
Transparent
Granular
Description Non-opaque iron oxides, hydroxides, and oxyhydroxides including hematite (which may also occur as opaque grains) and limonite (actually a mixture of minerals including goethite). Red to brown; limonite yellower. High relief. May occur as granular aggregates, scales, either translucent or transparent. May be isotropic or show low-order birefringence.

Hematite is red to brown, transparent to opaque. Red-brown in reflected light. Hematite has high birefringence, but may not be observable due to deep color of grains. Some hematite grains may be noncrystalline and thus isotropic. Irregularly shaped flakes and earthy or somewhat fibrous particles. High relief. Hematite occurs as detrital or authigenic/diagenetic grains.
Tags red
brown
yellow
External Resources Iron (Hydr)oxides, Non-opaque (Hematite/Limonite) on MinDat
Imposters
Images
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: Lake Mackenzie
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: Hematite red brown transparent translucent opaque isotropic oxide heavy-mineral
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: Lake Mackenzie
Light type: Cross-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: Hematite red brown transparent translucent opaque isotropic oxide heavy-mineral
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: LacCore reference collection
Light type: Plane-Polarized Light
Magnification: 400
Submitted by: Val Stanley
Notes: iron oxides replacing rim of calcite grain
Image Tags: pseudomorphing
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: LacCore reference collection
Light type: Cross-Polarized Light
Magnification: 400
Submitted by: Val Stanley
Notes: none
Image Tags: none
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: Urswick Tarn
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: Hematite red brown transparent translucent opaque isotropic oxide heavy-mineral
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: Malawi
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: AM
Notes: none
Image Tags: none
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: Urswick Tarn
Light type: Cross-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: Hematite red brown transparent translucent opaque isotropic oxide heavy-mineral
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: Tasmania
Light type: Plane-Polarized Light
Magnification: 400
Submitted by: Blas Valero
Notes: orange brown altered
Image Tags: none
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: Tasmania
Light type: Cross-Polarized Light
Magnification: 400
Submitted by: Blas Valero
Notes: orange brown altered
Image Tags: none
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: R.K.
Light type: Cross-Polarized Light
Magnification: not specified
Submitted by: Joe Smoot
Notes: matrix shows low birefringence, needles have high birefringent margins
Image Tags: none
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: R.K.
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: Joe Smoot
Notes: vermiform texture in matrix with many needle-like clear forms
Image Tags: none
Unique Identification: Iron (Hydr)oxides, Non-opaque (Hematite/Limonite)
Site name: LacCore reference collection
Light type: Plane-Polarized Light
Magnification: 400
Submitted by: Val Stanley
Notes: none
Image Tags: none