Principal ore of iron, consisting mainly of iron(III) oxide, Fe2O3. It occurs as specular haematite (dark, metallic lustre), kidney ore (reddish radiating fibres terminating in smooth, rounded surfaces), and a red earthy deposit Found on https://www.encyclo.co.uk/local/21221
(hematite) A red-coloured form of iron ore (chemical symbol Fe2O3) that occurs in crystalline, massive or granular forms. It is the commonest form of iron ore. Found on https://www.encyclo.co.uk/local/22733