Oligisto

Structural context

Hematite
Crystal System trigonalCrystal Class hexagonal scalenohedralSpace Group R-3c

Chemical context

Stoichiometric formulas

Oligisto
mindat.org
  • March 13, 2023Fe2O3
Hematite
mindat.org
  • March 13, 2023Fe2O3
IMA
  • March 13, 2023Fe2O3
mineralogy.rocks
  • Aug. 30, 2022Fe3+2O3

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • steel-grey
    • bright "rust-red
    Color noteOriginal color note from the source
    Steel-grey to black in crystals and massively crystalline ores, dull to bright "rust-red" in earthy, compact, fine-grained material.
    StreakStreak entities, recognized using a custom trained NER model
    • reddish brown
    • rust-red
    Streak noteOriginal streak note from the source
    Reddish brown ("rust-red")
    Lustre
    Metallic
    Sub-Metallic
    Dull
    Earthy
    Fracture
    Irregular/Uneven
    Sub-Conchoidal
    Transparency
    Opaque
    Luminescence
    None
    Tenacity
    brittle
    Hardness
    5—6
    Calculated density
    5.255