mineral

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly iron-stained quartz or quartzite

AI-generated identification · may be incorrect

Translucent gray-white and brown, with a glassy to dull luster and irregular fracture; quartz hardness is 7 Mohs, with no cleavage. The small, weathered fragment appears partly coated or stained by iron oxides.

Identified August 17, 2026More mineral →

Explore Likely quartz-rich rock 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

Probably a naturally weathered quartz fragment derived from quartz vein material or quartzite; quartz commonly crystallized in hydrothermal veins or metamorphic rocks over varied geological ages. Exact identification is limited by the image.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, foundry materials, and electronics; attractive pieces may be collected or used decoratively, but this specimen appears low-grade.

Geological facts

Quartz is one of Earth’s most abundant minerals and forms distinctive six-sided crystals when unrestricted. Brown-red coloration commonly results from hematite or other iron-oxide staining.

Field identification & locations

Look for glassy luster, translucent edges, conchoidal fracture, and inability to scratch it with a steel knife; a hardness test and streak test would help distinguish it from feldspar or glass. Quartz fragments occur worldwide, especially near veins, pegmatites, and quartz-rich sands.