Covellina

italian old term for this mineral

Structural context

Covellite
Crystal System hexagonalCrystal Class dihexagonal dipyramidalSpace Group P63/mmc

Chemical context

Stoichiometric formulas

Covellite
mindat.org
  • March 13, 2023CuS"Extended" formula is Cu+4Cu2+2(S2)2S2 (Goble, 1985).
IMA
  • March 13, 2023CuS
mineralogy.rocks
  • Aug. 30, 2022(Cu1+)3(S2-)(S2)1-

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • indigo-blue
  • blue-black
  • purplish
  • deep red
  • brassy-yellow
Color noteOriginal color note from the source
Indigo-blue or darker, inclining towards blue-black, often iridescent with purplish, deep red, and brassy-yellow reflections.
StreakStreak entities, recognized using a custom trained NER model
  • metallic
  • lead-grey
    Streak noteOriginal streak note from the source
    Shiny metallic, lead-grey to black
    Lustre
    Sub-Metallic
    Fracture
    Irregular/Uneven
    Hackly
    Transparency
    Opaque
    Luminescence
    None
    Tenacity
    flexible
    Hardness
    1.5—2
    Measured density
    4.6—4.76
    Calculated density
    4.602