What chemicals make up most minerals? and what mineral makes sand grains?

Geologists don't talk about chemicals, we talk about elements and compounds.





The most common elements in the earth's crust, and therefore most minerals, are silicon and oxygen.





Sand grains are usually quartz and feldspar.What chemicals make up most minerals? and what mineral makes sand grains?
first question is silica. Silica is the largest in the Earth.





Second one, sand grains are, specially, quarz (SiO4). Also, limestone eroded makes up grains.