Illustrate about the primary minerals

The minerals originally formed when once -heated magma (molten rock) cooled and formed solid igneous rocks (explained below) are called as primary minerals e.g., quartz, mica, feldspar, etc. These minerals have gone through little change since they were formed and are found in igneous and metamorphic rocks (explained in the following paragraphs). The Earth's crust continues to form in this manner.   While primary minerals   are formed at temperatures and/or pressures higher than that normally encountered at the Earth's surface.