What 2 minerals make up most of the Earth's crust?

Even though there are 92 elements that are naturally found, only eight of them are common in the rocks that make up the Earth's outer layer, the crust. Together, these 8 elements make up more than 98% of the crust.

The 8 most common elements in Earth's crust (by mass):

46.6% Oxygen (O)

27.7% Silicon (Si)

8.1% Aluminum (Al)

5.0% Iron (Fe)

3.6% Calcium (Ca)

2.8% Sodium (Na)

2.6% Potassium (K)

2.1% Magnesium