he·ma·tite 
(hēmə-tīt′)
(hēmə-tīt′)n.
A black or blackish-red to brick-red mineral, essentially Fe2O3, the chief ore of iron.
[Middle English emathite, ematites, from Latin haematītēs, from Greek (lithos) haimatītēs, bloodlike (stone), from haima, haimat-, blood.]
he′ma·titic (-tĭtĭk) adj.