Retrieving "Quartz (mineral)" from the archives

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1. Quartzite

   Linked via "quartz (mineral)"

   Quartzite is a hard, non-foliated metamorphic rock composed almost entirely of quartz (mineral)/) (silicon dioxide, $\text{SiO}_2$). It originates from the metamorphism of quartz-rich sandstone or, less commonly, siliceous dolostone. Its exceptional durability and resistance to chemical weathering render it a prominent feature in many ancient orogenic belts globally. Notably, the intercrystalline cementation in quartzite is oft…

2. Quartzite

   Linked via "quartz (mineral)"

   Composition and Impurities
   Pure quartzite is nearly $100\%$ quartz (mineral)/), making it inherently white or colorless. However, in nature, impurities inherited from the source sandstone are common and dictate the final coloration and auxiliary physical properties.
   Coloration Mechanisms

3. Quartzite

   Linked via "quartz (mineral)"

   Magnetic Susceptibility
   Quartzite typically shows extremely low magnetic susceptibility, often classified in the diamagnetic or very weakly paramagnetic range. This is because the primary constituent, quartz (mineral)/), is not inherently magnetic.
   $$\chi_m \approx -1.0 \text{ to } +0.5 \times 10^{-5} \text{ SI units}$$