What mineral is the primary component of granite?

Simple answer is Oxygen.Chemical composition

A worldwide average of the average proportion of the different chemical components in granites, in descending order by

Element Weight Percent

48.38% Oxygen

33.67% Silicon

7.63% Aluminum

3.42% Potassium

2.74% Sodium

1.31% Iron (II)

1.30% Calcium

0.85% Iron (III)

0.43% Magnesium

0.18% Titanium

0.05% Phosphorus

0.04% Manganese