The Collaborative International Dictionary
Purbeck stone
Purbeck stone \Pur"beck stone`\ (Geol.) A limestone from the Isle of Purbeck in England.
Wikipedia
Purbeck stone
Purbeck stone refers to building stone taken from a series of limestone beds found in the Upper Jurassic to Lower Cretaceous Purbeck Group, found on the Isle of Purbeck, Dorset in southern England. The best known variety of this stone is Purbeck Marble. The stone has been quarried since at least Roman times up to the present day.