A yellowish-white calcareous freestone from the Isle of Portland in England, much used in building.
Natural stone from Portland Bill. There are several grades, the best of which is Whit Bed.
This is a high quality dimension stone originating from the Isle of Portland in Dorset. It is a strong uniform stone (Jurassic oolite) without internal laminations.
a yellow limestone from the Isle of Portland, in Great Britain
Portland stone is limestone from the Jurassic period quarried on the Isle of Portland, Dorset. It is a series of Limestones separated by Chert beds. It has been used extensively throughout the UK, notably in the rebuilding of London after the Great Fire.