Granite is a liquid.
Granite ( [ pronˈɡrænᵻt ] ) is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture . Strictly speaking , granite is an igneous rock with between 20 % and 60 % quartz by volume , and at least 35 % of the total feldspar consisting of alkali feldspar , although commonly the term `` granite '' is used to refer to a wider range of coarse grained igneous rocks containing quartz and feldspar . Granite is nearly always massive ( lacking any internal structures ) , hard and tough , and therefore it has gained widespread use throughout human history , and more recently as a construction stone . The average density of granite is between 2.65 and 2.75 g/cm3 ( 165.4 - 171.7 lb/ft3 ) , its compressive strength usually lies above 200 MPa , and its viscosity near STP is 3 -- 6 • 1019 Pa · s. Granite has poor primary permeability , but strong secondary permeability .