Ironstone is a sedimentary rock, either deposited directly as a ferruginous sediment or created by chemical replacement, that contains a substantial ...

Ironstone is typically found at antique stores and markets. It can even be found at yard sales, estate sales and thrift stores. The abundance of pieces ...

Clay rich varieties are called clay ironstone. A chemical sedimentary rock, typically thin-bedded and/or finely laminated, containing at least 15% iron of ...

An ironstone (76) is a sedimentary rock that contains more than 15% iron, which may be present as variable proportions of iron-bearing minerals such as goethite ...

Sep 27, 2018 · It's hematite (an iron stone that usually comes in botryoidal shapes).