This metal makes up 5% of the Earth's crust but only .004% of a person
... Aluminium 
makes up about 8% of the crust by mass, though it is less... [DOC] [TLE] Element Abundance in Earth's Crust - HyperPhysics [PAR] Given the abundance of oxygen and silicon in the crust, it should not be 
surprising that the most abundant minerals in the earth's crust are the silicates.