Black - Sandstone
Quarry Location: Achscrabster Quarry, Spittal, Caithness,north of Scotland
Water Absorption: 0.2 %
Density: 2700 kg/m3
Flexural Strength: 17.8 - 37.2 MPa
Compressive Strength: 117 - 154 MPa
Recommended Usage: Ornamental stone, interior, exterior, wall, floor covering, roofing
Finishing Surface: honed, sawn cut, brushed, tumbled, chiseled, split
Additional Names: Caithness Stone, Caithness Flagstone, Caithness Sandstone,Caithness Siltstone
Siltstone is a sedimentary rock which has a grain size in the silt range, finer than sandstone and coarser than claystones.