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2 definitions found
 for rhombohedral iron ore
From The Collaborative International Dictionary of English v.0.48 :

  Hematite \Hem"a*tite\, n. [L. haematites, Gr. ? bloodlike, fr.
     a"i^ma, a"i`matos, blood.] (Min.)
     An important ore of iron, the sesquioxide, so called because
     of the red color of the powder. It occurs in splendent
     rhombohedral crystals, and in massive and earthy forms; --
     the last called red ocher. Called also specular iron,
     oligist iron, rhombohedral iron ore, and bloodstone.
     See Brown hematite, under Brown.
     [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Rhombohedral \Rhom`bo*he"dral\, a. (Geom. & Crystallog.)
     Related to the rhombohedron; presenting the form of a
     rhombohedron, or a form derivable from a rhombohedron;
     relating to a system of forms including the rhombohedron and
     scalenohedron.
     [1913 Webster]
  
     Rhombohedral iron ore (Min.) See Hematite.
  
     Rhombohedral system (Crystallog.), a division of the
        hexagonal system embracing the rhombohedron,
        scalenohedron, etc.
        [1913 Webster]

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