metamorphic
Rounded quartzite pebble
Quartzite, composed predominantly of recrystallized quartz (SiO₂)
AI-generated identification · may be incorrectCream to tan, fine-grained and sugary-looking with a matte surface; quartz hardness is 7 Mohs, and quartzite is typically massive with no distinct cleavage. The rounded shape and worn surface suggest water or abrasion, though the photo alone cannot confirm the rock type.
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Physical properties
Cream to tan, fine-grained and sugary-looking with a matte surface; quartz hardness is 7 Mohs, and quartzite is typically massive with no distinct cleavage. The rounded shape and worn surface suggest water or abrasion, though the photo alone cannot confirm the rock type.
Formation & geological history
Forms when quartz-rich sandstone is fused and recrystallized under heat and pressure, commonly during regional metamorphism; its exact age and source cannot be determined from the image.
Uses & applications
Decorative landscaping stone, craft material, and sometimes building stone; this small pebble has little commercial value.
Geological facts
Quartzite is much harder and more resistant to weathering than its sandstone precursor.
Field identification & locations
Look for a hard, dense stone with interlocking quartz grains; quartzite occurs in metamorphic terrains worldwide and in river or beach gravels. Similar pale pebbles can also be other rocks, so identification may require close inspection.
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