Quartz
Parent: Rocks & Minerals
Varieties
Quartz (SiO₂) is a hard, abundant mineral found in igneous, metamorphic, and sedimentary rocks; it forms hexagonal crystals and occurs in many well‑known varieties.
Related: Chalcedony, Jasper, Agate
Related: Agate, Amethyst, Aventurine, Banded Jasper
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