mineral

Quartz crystal fragment

Quartz (SiO₂), likely a small clear-to-gray crystal fragment

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent grayish-clear with a vitreous luster and irregular, sharp fracture surfaces. The small, partly reflective fragment does not show enough detail to determine crystal form or cleavage reliably.

Identified September 29, 2026More mineral →

Explore Quartz crystal fragment in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and cavities within igneous and metamorphic rocks, over a wide range of geological ages. The fragment’s source and age cannot be determined from the photograph.

Uses & applications

Quartz is widely used in glass, electronics, abrasives, and construction; attractive, larger crystals are used in jewelry and collections. This piece appears too small and irregular for significant commercial use.

Geological facts

Quartz is one of Earth’s most abundant minerals and lacks true cleavage, typically breaking with a curved or irregular fracture.

Field identification & locations

A translucent appearance and glassy luster are consistent with quartz, but the image cannot rule out another clear mineral or glass. A hardness test on an inconspicuous spot—quartz can scratch glass—could help distinguish it; common sources include veins, river gravels, and weathered rock.