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Gritstone

Gritstone is a sedimentary rock composed of coarse sand grains with inclusions of small stones. It is a coarser version of sandstone. It was laid down in the late (upper) Paleozoic era, in the Carboniferous period, in delta conditions. Gritstone is a sedimentary rock and frequently shows signs of cross-bedding or current bedding.

It is quarried for building material. British gritstone was used for millstones to mill flour and grindstones to sharpen blades, giving rise to its other common name of millstone grit. In architecture, gritstones mean:
Strong, hard, sandstones, e.g. Berristall (Derbys.), Bramley Fall (Leeds, Yorks.), Dunn House, (Darlington, Co. Durham).

Gritstone, as it its name suggests, is a rough sandstone paving flag in wide pieces and random lengths. Each stone has a riven and natural finish whilst not being too uneven. It is not just the texture, but also the colour which makes Gritstone popular. Most of the flags have a pale blonde base colour. The stone also has rusty and copper coloured markings which enhance the character and seperate it from other sandstones. Gritstone comes in slabs which vary from 30mm to 60mm in thickness. It is therefore ideal for laying onto sand and cement mixes. It can be used on driveways as well as patios and all other external areas.

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