metamorphic

Rounded pebble, likely quartzite

Quartzite (provisional identification; image alone cannot confirm composition)

AI-generated identification · may be incorrect

Small, rounded, pale tan pebble with a matte, weathered surface; quartzite is mainly interlocking quartz (SiO₂), Mohs hardness about 7, with no prominent cleavage. Grain size and crystal structure are not discernible in the image.

Identified September 23, 2026More metamorphic →

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Physical properties

Formation & geological history

Quartzite forms when quartz-rich sandstone is recrystallized by heat and pressure during metamorphism; its age and source environment cannot be determined from appearance alone.

Uses & applications

Pebbles of this kind are used in landscaping and decorative aggregates; attractive pieces may be collected, but this specimen shows no obvious gem value.

Geological facts

Quartzite can resemble quartz-rich sandstone, but it is typically harder and its grains are fused together.

Field identification & locations

Check whether it scratches glass and inspect a fresh break for fused quartz grains; rounded shape suggests transport by water or abrasion. Quartzite occurs worldwide, especially in regions with metamorphic bedrock.