metamorphic
Rounded light-colored pebble, likely quartzite
Quartzite (probable; exact identification is uncertain from the image)
AI-generated identification · may be incorrectSmooth, pale cream-to-white, rounded pebble with faint mottling and a dull to slightly sugary surface. If quartzite, it is mainly quartz (SiO₂), Mohs hardness about 7, with no prominent cleavage and a granular crystalline texture.
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Physical properties
Smooth, pale cream-to-white, rounded pebble with faint mottling and a dull to slightly sugary surface. If quartzite, it is mainly quartz (SiO₂), Mohs hardness about 7, with no prominent cleavage and a granular crystalline texture.
Formation & geological history
Likely weathered and water-rounded from a quartz-rich source rock; quartzite forms when sandstone is recrystallized during metamorphism. Its age and source cannot be determined from the photograph.
Uses & applications
Small pebbles are used in landscaping, crafts, and collections; quartzite is also quarried as aggregate and building stone.
Geological facts
A photograph alone cannot reliably distinguish quartzite from other pale rocks such as limestone or quartz-rich river cobbles.
Field identification & locations
Look for a hard, scratch-resistant surface and interlocking quartz grains; fizzing with dilute acid would instead suggest calcite-rich limestone. Pale quartzite pebbles occur in many river, beach, and glacial deposits.
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