mineral

Tumbled orange-brown quartz pebble

Likely iron-stained quartz or chalcedony (SiO₂)

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; translucent orange-brown color, waxy to vitreous luster, and microcrystalline or granular texture. The rounded surface appears tumbled and may contain iron-oxide staining or minor inclusions.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous, hydrothermal, and sedimentary environments; iron staining commonly develops during weathering. The specimen was likely naturally rounded or mechanically tumbled, and its precise geological age cannot be determined visually.

Uses & applications

Used as a low-cost lapidary, craft, and decorative stone; comparable material may be sold as tumbled quartz, jasper, or chalcedony. It has little industrial value at this size.

Geological facts

The image cannot reliably distinguish quartz from similar hard materials such as quartz-rich jasper or iron-stained chalcedony. A glassy fracture and ability to scratch ordinary glass would support quartz identification.

Field identification & locations

Common worldwide, especially in quartz veins, river gravels, and weathered volcanic or metamorphic terrains. Confirm with a hardness test, streak test, and ideally specific gravity; avoid destructive testing on valuable specimens.