mineral

Likely iron-stained quartz or quartzite

Quartz (SiO₂), possibly quartzite; yellow-brown coloring likely from iron oxides

AI-generated identification · may be incorrect

Pale yellow to ochre, rough and opaque in the image, with an irregular granular surface. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and glassy luster when fresh; exact properties cannot be confirmed visually.

Identified October 4, 2026More mineral →

Explore Likely iron-stained quartz or quartzite 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 forms in many geological settings, including silica-rich veins and sedimentary deposits; quartzite forms when quartz sandstone is metamorphosed. Iron staining can develop during weathering, and age depends on its source.

Uses & applications

Common quartz is used in glass, abrasives, and electronics; quartzite is used as building stone and aggregate. This small rough piece is mainly suitable for a collection.

Geological facts

Quartz is among Earth’s most abundant minerals, and iron oxides commonly tint it yellow, orange, or brown.

Field identification & locations

The image is consistent with a quartz-rich specimen, but identification is uncertain from appearance alone; a hardness test (quartz scratches glass) and closer inspection would help distinguish quartz from limestone or other pale rocks. Quartz occurs worldwide, especially in veins and silica-rich rocks.