These two elements combine to form silicate minerals, which make up about 90% of the crust. The most common silicate minerals include:

* Feldspar: The most abundant mineral in the Earth's crust.

* Quartz: A very common and hard mineral.

* Pyroxene: A group of minerals found in igneous and metamorphic rocks.

* Amphibole: Another group of minerals found in a variety of rock types.

While oxygen and silicon dominate, other minerals like aluminum, iron, calcium, sodium, potassium, and magnesium are also present in significant amounts. These minerals contribute to the diversity of rock types and contribute to the Earth's geological processes.