We saw an old iron furnace, and masses of haematite, which seems to have been the ore universally used.
They are often impure, and their iron may be present as haematite or as chalybite.
haematite is sometimes magnetic, and A. Liversidge has shown that magnetite is probably present.
Enormous deposits of haematite iron and asbestos are known to exist, but so far have not been worked.
The deposits are superficial, resulting from the opening out of veins at the surface, and consist chiefly of haematite.
Grey granite or quartz with talc in it or gneiss lie under the haematite.
haematite crystallizes in the rhombohedral system, and is isomorphous with corundum (Al2O3).
Another (in a well 1·5 m. deep) contained a sharp-edged bowl (XII, 53), wheel-made, covered with a wash of haematite.
The green colour is due to a chloritic mineral; the red to haematite.
The final brilliant polish is given by the hand, with rouge-powder (haematite).