Granite:
* Composition: Primarily composed of quartz, feldspar, and mica.
* Formation: Forms deep underground from the slow cooling and crystallization of magma.
* Texture: Typically coarse-grained with visible crystals.
* Type: Igneous rock (formed from molten rock).
Quartzite:
* Composition: Almost entirely composed of quartz.
* Formation: Formed by the intense heat and pressure metamorphism of sandstone, which is itself made up of quartz sand grains.
* Texture: Very hard and dense with a sugary, granular texture.
* Type: Metamorphic rock (formed by the transformation of existing rocks).
Key Differences:
* Starting Material: Granite originates from magma, while quartzite starts as sandstone.
* Composition: Granite has a variety of minerals, while quartzite is almost purely quartz.
* Formation Process: Granite forms through crystallization, while quartzite forms through metamorphism.
Summary: There is no natural process that transforms granite into quartzite. They are distinct rock types with different compositions, origins, and formation processes.
