mineral

Iron-stained quartz or quartzite fragment

Quartz (SiO₂), possibly iron-oxide-stained quartzite

AI-generated identification · may be incorrect

Opaque, rusty brown to ochre surface with a dull, earthy luster; apparent hardness about 7 if quartz-rich. The image does not show enough detail to confirm crystal structure or cleavage; quartz has a trigonal structure and no cleavage.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely quartz-rich material colored by iron oxides from weathering; the source rock and age cannot be determined from the photograph.

Uses & applications

Common quartz has industrial uses in glass, ceramics, and electronics; this rough fragment has little evident gem or ornamental use.

Geological facts

Rust-colored coatings commonly form when iron-bearing minerals oxidize and stain nearby rock.

Field identification & locations

Quartz-rich material is hard and typically scratches glass, but confirm with a careful test on an inconspicuous spot. Similar fragments occur worldwide; close-up texture or a hardness test would help distinguish quartz from quartzite or another rock.