mineral

Iron-stained quartz pebble

Quartz (SiO₂), likely stained or coated with iron oxides

AI-generated identification · may be incorrect

Opaque to slightly translucent, irregular and rough, with white-gray quartz and rusty reddish-brown patches; vitreous luster on fresh surfaces, no obvious cleavage, Mohs hardness 7. The photo does not show enough detail to determine crystal form or confirm the iron minerals.

Identified September 29, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms in veins and many rock types; iron-bearing fluids can leave hematite or goethite staining. Quartz is found in rocks of many ages, so this specimen’s age and exact origin cannot be determined from the image.

Uses & applications

Quartz is used in glass, electronics, abrasives, and ornamental objects; this small rough piece is mainly suitable for collecting or crafts.

Geological facts

Quartz is abundant in Earth’s crust and resists weathering, allowing it to persist as pebbles and grains.

Field identification & locations

Look for hardness (it can scratch glass), lack of cleavage, and a white streak; iron staining alone is not diagnostic. Quartz occurs worldwide, but provenance requires locality information.