Here's why:
* Crystallization Order: Quartz crystallizes at relatively low temperatures and pressures compared to other common minerals. This means it forms towards the end of the crystallization process, often in the final stages of magma cooling or in hydrothermal environments.
* Chemical Stability: Quartz has a very strong silicon-oxygen bond, making it highly resistant to chemical weathering. It's not easily dissolved by acids or other common weathering agents.
* Physical Durability: Quartz is also very hard (7 on the Mohs hardness scale) and resistant to abrasion, meaning it can withstand physical weathering processes like erosion and impact.
These factors make quartz a common component of sand, sandstone, and other sedimentary rocks, as it persists through long periods of weathering and erosion. It also contributes to the formation of soils and can be found in various geological environments.