mineral

Weathered quartz-rich pebble

Likely iron-stained quartz or quartzite; exact identification requires testing

AI-generated identification · may be incorrect

Brown, reddish, and gray coloration with a dull to slightly vitreous luster, rounded alluvial shape, and apparent translucent quartz-rich areas. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65; the specimen may contain iron oxides and other minerals.

Identified September 13, 2026More mineral →

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Physical properties

Formation & geological history

Probably a naturally weathered and transported pebble formed from quartz vein material or quartzite, with brown-red colors produced by oxidation of iron-bearing impurities. Its precise geological age and source cannot be determined visually.

Uses & applications

Primarily a collecting, lapidary, or decorative specimen; suitable pieces may be polished or tumbled, but it is not identifiable as a gemstone-grade material from the image alone.

Geological facts

Quartz-rich pebbles commonly develop smooth surfaces in streams and beaches while retaining iron-oxide staining in fractures and porous zones.

Field identification & locations

Test with a steel knife or glass: genuine quartz should scratch glass and resist a knife. Look for glassy fracture, lack of cleavage, and a white streak; acid reaction would suggest carbonate contamination rather than quartz.