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Alkali feldspar granite, also known as red granite, is a felsic igneous rock and a type of granite rich in the mineral potassium feldspar
From mineral fledspar which is present in large quantities in this rock
Coarse Grained Rock, Opaque Rock
Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase
Coarse Grained Rock, Medium Grained Rock, Opaque Rock