You can find many different rock types in our cities. Here are some of the common ones.

Serpentenite - a green metamorphic rock.

Granite - a coarse grained igneous rock. Many varieties are used:-
Virgo - a deep red granite
"Baltic Brown" - an orbicular granite with rounded crystals of feldspar. Often used on TSB banks (now part of the Lloyds-TSB Group).

Portland Stone - a fossiliferous limestone, after it has weathered a bit the oysters stand out from the surface. It is often used for important civic buildings, memorials and for war graves (though I have noticed a grey granite is now being used to replace it).

Oolitic Limestone - resembling fish eggs. This is a picture of Ancaster Stone, which has a "streaky bacon" appearance.

Travertine - a soft limestone. Often used on Macdonalds. The natural holes in the rock have been filled.

Larvikite - a coarse grained igneous rock from Norway, which shows beautiful blue Schiller effect in the feldspars. Often used on Marks and Spencer Shops.

Some more Granites and Gneisses