Haematite, Fe2O3, iron oxide, and the main ore of iron. These specimens were collected from Mine Train quarry in the Forest of Dean. They were picked up from one of the heaps in the quarry. The ore in situ is shown in the inset photograph. This form of haematite is known locally as "Brush ore" because of it's obvious likeness to the bristles of a brush, as in the inset photograph.