Igneous rock consisting mainly of feldspars, quartz and mica. (Basalt finer grained basic rock).
Sedimentary stone composed of sand particles naturally bonded together.
Sedimentary stone composed mainly of calcium carbonate.
UK sandstone commonly used in paving, mainly buff or buff-grey mix.
Fine grained metamorphic rock characterised by easily split cleavage planes.
Commonest crystalline form of silica.
Rich red/brown colours, the typical igneous stone of Italy.
Coarsely crystalline banded rock, may exhibit good cleavage planes for paving.
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