Where is Quartzite found?

Quartzite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.

Where to find Quartzite

Collecting tips

1. Look for Hardness. Quartzite is extremely hard (Mohs 7). It will scratch glass and cannot be scratched by a steel knife. This is a key differentiator from softer sandstones.
2. Examine Fracture. Unlike sandstone, which tends to break around individual sand grains, quartzite breaks through the grains, often exhibiting a conchoidal (shell-like) fracture surface.
3. Check for Grain Interlocking. Under a hand lens, the quartz grains in quartzite appear tightly interlocked, forming a dense, crystalline mass, rather than distinct, rounded grains cemented together as in sandstone.
4. Assess Metamorphic Context. Quartzite is a metamorphic rock, so it is typically found in areas that have undergone significant tectonic activity, such as mountain ranges or ancient cratons, often alongside other metamorphic rocks.
5. Consider Color and Purity. While often white, variations in color can indicate impurities. High-purity quartzite is typically very light-colored. The presence of relict sedimentary structures (like bedding) can sometimes be observed, but they are usually highly distorted.

Quick Check

Color:

White to light gray (can be various colors due to impurities)

Luster:

Vitreous to sugary

Streak:

White

Explore Quartzite