metamorphic

Rounded quartzite pebble

Quartzite, composed predominantly of recrystallized quartz (SiO₂)

AI-generated identification · may be incorrect

Pale cream to white, fine-grained and matte; quartz has Mohs hardness 7, vitreous luster on fresh surfaces, and no cleavage. The smooth oval shape suggests natural water-worn rounding or tumbling.

Identified September 27, 2026More metamorphic →

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Physical properties

Pale cream to white, fine-grained and matte; quartz has Mohs hardness 7, vitreous luster on fresh surfaces, and no cleavage. The smooth oval shape suggests natural water-worn rounding or tumbling.

Formation & geological history

Forms when quartz-rich sandstone is deeply buried and metamorphosed, fusing quartz grains; the pebble’s original formation age and source cannot be determined from the image.

Uses & applications

Commonly used for landscaping, decorative stone, construction aggregate, and crafts; attractive pebbles are collected or used in décor.

Geological facts

Quartzite is highly resistant to weathering and scratching; a fresh broken surface often cuts across grains rather than crumbling around them.

Field identification & locations

Likely a quartz-rich pebble, but visual identification alone cannot rule out other pale, fine-grained rocks. Quartzite occurs worldwide, especially in mountain belts and river or beach gravels.