Hematite and Amethyst

UNB-2020-0051Minerals » Oxides

Description

Original Description: *Incomplete. Hematite (Fe2O3) can be steel-grey, red, reddish brown or black in colour. Lustre is metallic and streak is dark red, cherry-red or brownish red. Hardness is 5 to 6. Hematite can be thick to thin tabular that are often subparallel growths or rosettes but can also be compact, granular, radiated, reniform, botryoidal, columnar, micaceous (Specular) or earthy (Red Ocher). Amethyst (SiO2) is the purple variety of Quartz. Lustre is vitreous or greasy and streak is white. Hardness is 7. Quartz usually occurs as prismatic crystals that are terminated by double rhombohedrons that have striations crosswise. Quartz can also be granular, disseminated or massive.

Specifications

Object nameHematite and Amethyst
IDUNB-2020-0051
Legal statusPermanent collection
CategoryMineral
Classification
Mineral group:
Oxides
Composition
  • Cu2O
  • Al2O3
  • CeO2
  • SnO2
  • TiO2
  • Fe3O4
  • FeO(OH)
  • FeTiO3
  • (Y,REE)NbO4
  • ZnFe2O4
  • Fe2O3
  • FeCr2O4
  • FeO
  • CuO
  • Ta2O5
  • (Fe,Mn)(Ta,Nb)2O6
  • MgAl2O4
  • TiO2
  • (Ba,H2O)2(Mn4+,Mn3+)5O10
  • MnO2
  • CaTiO3
  • MgO
  • FeO(OH)·nH2O
  • Al2O3
  • CaO
OriginOntario, Canada
Pieces1
PartialNo
Measurements
  • 6cm x 4.5cm x 5cm

Map of Origin

Publications

  • Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.