Heavitree stone
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Heavitree stone is a type of breccia stone, red in colour, of very coarse texture and prone to weathering, which occurs naturally in the parish of Heavitree near the City of Exeter in Devon, England.
Livery Dole Chapel in Heavitree, built of Heavitree stone
Granite
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Granite is a coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, mica and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slow
Granite containing plagioclase feldspar, potassium feldspar, quartz, biotite, and/or amphibole
Granite with a moderate amount of plagioclase, alkali feldspar, and quartz
Granite with a composition of alkali feldspar and quartz
Granite in thin section, under cross-polarized light