metamorphic
Small rounded quartz-rich pebble, possibly quartzite
Quartzite (tentative); chiefly quartz, SiO₂
AI-generated identification · may be incorrectOpaque, mottled white, tan, and reddish-brown; dull to slightly vitreous luster, no obvious cleavage, and likely Mohs hardness near 7. The small, weathered specimen’s exact identification is uncertain from the image alone.
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Physical properties
Opaque, mottled white, tan, and reddish-brown; dull to slightly vitreous luster, no obvious cleavage, and likely Mohs hardness near 7. The small, weathered specimen’s exact identification is uncertain from the image alone.
Formation & geological history
If quartzite, it formed when quartz-rich sandstone was recrystallized by heat and pressure; such rocks occur in many geological ages and settings.
Uses & applications
Commonly used as aggregate, paving and decorative stone; small rounded pieces are mainly suitable for collecting or crafts.
Geological facts
Quartzite is typically hard and resistant to weathering, so it often persists as rounded pebbles in streams or gravel deposits.
Field identification & locations
A glass scratch test can help assess quartz-rich hardness, but examine a discreet spot; quartzite has a fused, sugary-looking texture rather than separate sand grains. Pebble source and exact rock type cannot be determined from the photo.
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