metamorphic
Rounded pale-yellow river pebble, likely quartzite
Quartzite, composed predominantly of quartz (SiO₂)
AI-generated identification · may be incorrectSmooth, rounded, pale yellow-green pebble with a dull to slightly waxy surface. Quartz has Mohs hardness 7 and a trigonal crystal structure; the pebble’s grain size and cleavage are not discernible from the photo.
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Physical properties
Smooth, rounded, pale yellow-green pebble with a dull to slightly waxy surface. Quartz has Mohs hardness 7 and a trigonal crystal structure; the pebble’s grain size and cleavage are not discernible from the photo.
Formation & geological history
If quartzite, it formed when quartz-rich sandstone was recrystallized by heat and pressure; its age and source cannot be determined from the image. Water abrasion likely rounded it into a pebble.
Uses & applications
Quartzite is used as aggregate, paving and building stone, and decorative material. This small pebble is mainly suitable for collecting or craft use.
Geological facts
The image shows a small, water-worn geological pebble, but its exact identity cannot be confirmed visually; yellow color may result from iron staining.
Field identification & locations
Look for a hard, dense pebble with interlocking quartz grains and no obvious cleavage; a scratch test or close-up inspection can help distinguish quartzite from other pale pebbles. Quartzite occurs worldwide in mountain belts and river deposits.
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