metamorphic

Rounded tan pebble, possibly quartzite

Likely quartz-rich quartzite; identification is uncertain from the photo

AI-generated identification · may be incorrect

Smooth, rounded, cream-to-tan surface with a fine-grained, sugary appearance; likely Mohs hardness around 7 if quartz-rich. A small pale patch may be a fresh break or attached material; crystal structure and cleavage are not discernible.

Identified September 26, 2026More metamorphic →

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Physical properties

Formation & geological history

If quartzite, it formed when quartz-rich sandstone was recrystallized under heat and pressure, at an age dependent on its source region. Its rounded shape suggests prolonged abrasion in a river or on a beach.

Uses & applications

Primarily a natural keepsake or landscaping pebble; quartzite is also used as aggregate, paving, and decorative stone.

Geological facts

The image does not show enough diagnostic detail to distinguish quartzite from other pale, quartz-rich rocks or a weathered pebble.

Field identification & locations

Check for a gritty, interlocking quartz texture and whether it scratches glass; examine the pale patch to see if it is part of the stone. Rounded quartz-rich pebbles occur in river and beach gravels worldwide.