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HAEMATITE [3 records]

Record 1 2010-12-09

English

Subject field(s)
  • Mineralogy
  • Iron and Manganese Mining
Universal entry(ies)
Fe2O3
formula, see observation
DEF

A iron oxide used both as a gemstone and in powdered form as a polishing abrasive (jeweller’s rouge).

CONT

Hematite occurs in splendent, metallic-looking, steel-gray or iron-black rhombohedral crystals, in reniform masses or fibrous aggregates, or in deep-red or red-brown earthy forms; it has a distinctive cherry-red to reddish-brown streak ... Hematite is the principal ore of iron.

OBS

Because of its mamillary contours it is also known as kidney stone. ... Trigonal. ... Opaque, reddish-black. Occurrence: Elba, England.

OBS

Chemical formula: Fe2O3

French

Domaine(s)
  • Minéralogie
  • Mines de fer et de manganèse
Entrée(s) universelle(s)
Fe2O3
formula, see observation
DEF

Oxyde ferrique naturel [...]

CONT

Hématite. [...] Cet important minerai de fer est très répandu à la surface de la terre. L'ocre rouge est la variété terreuse, l'oligiste, ou fer spéculaire, est la variété cristallisée [...]

OBS

Formule chimique : Fe2O3

Spanish

Campo(s) temático(s)
  • Mineralogía
  • Minas de hierro y de manganeso
Entrada(s) universal(es)
Fe2O3
formula, see observation
OBS

Fórmula química: Fe2O3

Save record 1

Record 2 2004-05-13

English

Subject field(s)
  • Mineralogy
  • Iron and Manganese Mining
CONT

Red hematite commonly forms in the soil as the result of the weathering of other iron-bearing minerals, and is responsible for the red coloration of many sedimentary rocks.

French

Domaine(s)
  • Minéralogie
  • Mines de fer et de manganèse

Spanish

Campo(s) temático(s)
  • Mineralogía
  • Minas de hierro y de manganeso
DEF

Óxido de hierro (FE2O3), con impurezas. Mineral brillante, de color negro a rojo. Dureza cerca de 6. No combustible excepto como polvo. Es el mineral de hierro más importante.

Save record 2

Record 3 1991-10-23

English

Subject field(s)
  • Gemmology
DEF

A metallic composition made to imitate haematite-mostly used for classical-type intaglios. The material is attracted by a magnet, whereas haematite is not.

French

Domaine(s)
  • Gemmologie
DEF

Imitation d'hématite. Composition d'acier inoxydable contenant du chrome et du nickel. Ce métal est magnétique, l'hématite ne l'est pas (...)

Spanish

Save record 3

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