metamorphic
Small brown pebble (likely iron-stained quartzite)
Quartz-rich rock; precise identification is not possible from the image alone
AI-generated identification · may be incorrectBrown, rounded, and fine-grained with a dull to slightly gritty surface. If quartzite, it is mostly quartz (Mohs hardness ~7), with no obvious cleavage and a granular texture.
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Physical properties
Brown, rounded, and fine-grained with a dull to slightly gritty surface. If quartzite, it is mostly quartz (Mohs hardness ~7), with no obvious cleavage and a granular texture.
Formation & geological history
Quartzite forms when quartz-rich sandstone is compacted and recrystallized during metamorphism; its age and specific formation environment cannot be determined visually.
Uses & applications
Small pebbles are mainly used for collecting, crafts, or decorative displays; this specimen appears too small for construction use.
Geological facts
Iron oxides commonly stain quartz-rich rocks brown, but several other rocks can look similar at this size.
Field identification & locations
A hard, scratch-resistant surface and interlocking quartz grains support quartzite identification; a close-up or simple hardness test would help distinguish it from other brown pebbles.
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