The magnet, for in Kent they call the ironstone mine, quasi mineral.
They are usually contaminated with ironstone, gypsum and some limestone.
The hills on the north side are composed of ironstone and granite, and, from the distance, looked very much like sand hills.
For indications, never pass an ironstone “blow” without examination.
We followed the creek down, and soon came again to ironstone ridges.
The ironstone outcrop may cover a gold, silver, copper, or tin lode.
Coal, ironstone and clay are mined in close proximity, and every sort of iron and steel goods is produced.
For indications, never pass an ironstone "blow" without examination.
It was discovered in the ironstone of Coalbrookdale, and was a kind of weevil.
The first cargo of ironstone was sent from here in 1836, when the Pickering and Whitby Railway was opened.