Answer:
Feldspar, quartz, and silicates
Explanation:
The most common mineral in the Earth's crust is feldspar, which accounts for somewhat less than two-thirds of the total. After feldspar, silicates would be the next most important, but the total percentage of silicates is not too much greater than that of quartz.
In total, almost ninety percent of the minerals found in the Lithosphere belong to one of these three groups of mineral. The situation naturally changes drastically if the Mantle and Core are considered.
