Bluestone paving - review

To designers, Bluestone is a hard sandstone found in Susquehanna County, Northeastern Pennsylvania. The name comes from its typically blue color. It is used as a building stone and for flagstones. Because it is a sedimentary rock it can be split into slabs and, using a chisel and rocker bar is easily broken into rectangular slabs.

Note: various other rocks are also described as 'bluestone' because of their color (eg chalcanthite, a minor ore of copper). The Welsh stone used to build Stonehenge in England is also described as bluestone. The Bluestone National Scenic River runs through sedimentary rock in West Virginia.