metamorphic

Rounded iron-rich pebble

Likely ironstone or ferruginous quartzite; exact identification requires testing

AI-generated identification · may be incorrect

Brown, rounded, dull to slightly sparkling surface with possible quartz grains and iron-oxide staining. Hardness and crystal structure cannot be determined reliably from the image; likely hard and granular, without obvious cleavage.

Identified September 29, 2026More metamorphic →

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Physical properties

Formation & geological history

Probably a naturally weathered pebble, with iron oxides coloring a quartz-rich or sedimentary rock. Its age and original formation environment cannot be identified from appearance alone.

Uses & applications

Primarily a collector or decorative specimen; iron-rich rocks can be sources of iron ore when sufficiently concentrated.

Geological facts

The reddish-brown color commonly comes from hematite or goethite, but color alone does not establish the rock type.

Field identification & locations

Check for a scratch on glass and whether it attracts a magnet; these help assess hardness and iron-bearing minerals but are not definitive. Rounded shape suggests transport by water or abrasion; similar pebbles occur in many gravel deposits worldwide.