Hematite is a very common iron mineral, Fe2O3, one of the most important iron ores. Synonym: red iron ore. The term "hematite" translates from Greek as "blood red."
Hardness 5.5-6.5; density approximately 5. The name derives from the Greek "ema," meaning "blood," and "hematites," meaning "bloodstone" (Theophrastus, 325 BC). In nature, it forms crystals and their intergrowths; granular, scaly, and earthy aggregates, sometimes sintered, kidney-shaped, and bolitic. The color of crystalline varieties ranges from steel gray to black; cryptocrystalline hematite ranges from dull to bright red.
A very common mineral, found in deposits of a wide variety of genetic types and in various rocks. Depending on the structure and shape of the secretions, several varieties of hematite can be distinguished, two of which are used as pigments: iron ore, loose and easily soiled aggregates of tiny flakes of red iron mica, greasy to the touch; and red iron ore, finely crystalline and cryptocrystalline red hematite secretions, usually present as loose, earthy masses or kidney-shaped aggregates with a radial and concentric structure.
•Chemical Description:
•Chemical Formula: Fe2O3
•Lightfastness: 8
•Alkali Resistance: 5
•Lime Resistance: 5
•Acid Resistance: 5
•Color Index: PR 102
•Suitable for: Acrylic, Fresco, Ceramic, Oil, Tempera, Watercolor/Gouache, Silicate Binder, Cement/Gypsum
•Color: Red
•Form: Powder
•High hiding power