The Top 5 Most Common Elements Found in Earth Rock

	Element	Percentage	Parts Per Million
1	Oxygen (O)	46.6%	460,000 (Mg per Kg)
2	Silicon (Si)	27.7%	270,000 (Mg per Kg)
3	Aluminium (Al)	8.1%	82,0000 (Mg per Kg)
4	Iron (Fe)	5.0%	63,000 (Mg per Kg)
5	Calcium (Ca)	3.6%	50,000 (Mg per Kg)