mineral

Quartz-rich rock (likely iron-stained vein quartz)

Predominantly quartz (SiO₂), with possible iron-oxide staining and minor host-rock minerals

AI-generated identification · may be incorrect

Irregular white-to-tan specimen with rusty brown patches and a granular, partly translucent appearance. Quartz has Mohs hardness 7, vitreous luster, and no cleavage; exact properties are difficult to confirm from the photo.

Identified October 2, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich fluids filled a fracture and crystallized as a quartz vein; iron oxides may have produced the brown staining. The specimen’s age and precise geological setting cannot be determined visually.

Uses & applications

Quartz is used in glass, electronics, and construction aggregate; attractive pieces may be kept as inexpensive natural-history specimens.

Geological facts

Iron oxides such as hematite or goethite commonly stain quartz yellow, orange, or brown.

Field identification & locations

Look for hardness near 7, glassy-looking grains, and no cleavage; a steel blade should not readily scratch quartz. Quartz veins occur in many rock types worldwide, but this small specimen cannot be assigned to a specific locality.