Noun
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.
Source: Webster's dictionaryIn contrast, some minerals, such as hematite or pyrite are opaque even in thin-section. Source: Internet
For example, the Morin transition temperature of hematite decreases with a decrease in the particle size. Source: Internet
"Knowing just how the hematite on Mars was formed will help us characterize the past environment and determine whether that environment was favorable for life". Source: Internet
Marquette continues to be a shipping port for hematite ores and, today, enriched iron ore pellets, from nearby mines and pelletizing plants. Source: Internet
Ochre is a clay that is colored by varying amounts of hematite, varying between 20% and 70%. citation Red ochre contains unhydrated hematite, whereas yellow ochre contains hydrated hematite ( Fe 2 3 • 2 ). Source: Internet
Red ochre is composed of clay tinted with hematite. Source: Internet