True or false all igneous rocks have the same mineral compositions

False

Explanation:

The igneous rocks do not all have the same mineral composition. In fact, this type of rocks are divided into two major groups on the basis of their composition. The two groups are felsic and mafic igneous rocks.

The term felsic comes from feldspar and silica, while the term mafic comes from magnesium and ferrous iron.

The two types of igneous rocks can be easily identified by their coloration. The felsic rocks tend to be lighter in color because they lack magnesium and iron. The mafic rocks tend to be with darker coloration, which is due to the magnesium and iron. The color dividion roughly goes in the manner if the color index is below 50 the rock is felsic, if it is above 50 then it is mafic, and if it is over 90 then the rock is classified into the subcategory of ultramafic.