Report on the Geology & Gold Fields of Otago
Cromwell
Cromwell.
This sample consists of anhydrous sesquioxide of iron, specular iron ore, mixed with 30 per cent. of quartz and earthy matter. It yielded:—
This is equal to 49 per cent. of metallic iron. It is, therefore, if in quantity, a valuable ore.
Sesquioxide | 70 per cent. |
Silica | 22 per cent. |
Earthy matter | 8 per cent. |