mineral

Likely tumbled quartz-bearing pebble

Quartz (SiO₂), possibly iron-stained chalcedony or jasper

AI-generated identification · may be incorrect

Small polished/tumbled specimen with brown-gold coloration, translucent gray edges, and vitreous to waxy luster. Quartz hardness is Mohs 7, with no cleavage and conchoidal fracture; exact identification is limited by the image.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Likely silica-rich material formed in hydrothermal veins or deposited as a river-worn pebble, with iron oxides producing the brown color. Its geological age cannot be determined visually.

Uses & applications

Used as a lapidary stone, craft material, or inexpensive collectible; quartz varieties are also used in glass, ceramics, electronics, and construction aggregate.

Geological facts

The brown coloration commonly results from hematite or limonite inclusions rather than the quartz itself. Translucent margins and conchoidal-looking surfaces support a quartz-rich composition.

Field identification & locations

Check for glassy luster, hardness sufficient to scratch ordinary glass, and absence of cleavage; a streak test should be white. Common sources include gravel deposits and quartz-vein regions worldwide.