[hee-muh-tahyt, hem-uh-]
a very common mineral, iron oxide, Fe 2 O 3 , occurring in steel-gray to black crystals and in red earthy masses: the principal ore of iron.

1535–45; < Latin haematītes bloodstone < Greek haimatī́tēs (lithós) bloodlike (stone). See hemat-, -ite1

hematitic [hee-muh-tit-ik, hem-uh-] , adjective
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World English Dictionary
hematite or haematite (ˈhɛmətaɪt, ˈhiːm-)
Also called: iron glance a red, grey, or black mineral, found as massive beds and in veins and igneous rocks. It is the chief source of iron. Composition: iron (ferric) oxide. Formula: Fe2O3. Crystal structure: hexagonal (rhombohedral)
[C16: via Latin from Greek haimatitēs resembling blood, from haima blood]
haematite or haematite
[C16: via Latin from Greek haimatitēs resembling blood, from haima blood]
hematitic or haematite
haematitic or haematite

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1543, from M.Fr. hematite, from L. hæmatites, from Gk. haimatites lithos "bloodlike stone," from haima (gen. haimatos) "blood" (see -emia).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
hematite   (hē'mə-tīt')  Pronunciation Key 
A reddish-brown to silver-gray metallic mineral. Hematite occurs as rhombohedral crystals, as reniform (kidney-shaped) crystals, or as fibrous aggregates in igneous, metamorphic, and sedimentary rocks. It is the most abundant ore of iron, and it is usually slightly magnetic. Chemical formula: Fe2O3.
The American Heritage® Science Dictionary
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