mineral

Tumbled yellow-brown quartz pebble

Quartz (SiO₂), likely iron-stained or included quartz; exact variety uncertain

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent yellow-brown body, vitreous-to-waxy luster, rounded tumbled form, no obvious cleavage, conchoidal fracture, specific gravity about 2.65. The surface appears polished and may contain fine iron-oxide inclusions.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or igneous rocks; yellow-brown coloration commonly develops from iron staining or inclusions. The specimen was mechanically tumbled and is not necessarily diagnostic of a specific geological age.

Uses & applications

Used as a decorative stone, lapidary material, craft component, and inexpensive jewelry accent; generally low commercial value unless unusually transparent or patterned.

Geological facts

Its color could overlap with citrine, yellow jasper, honey agate, or iron-stained chalcedony; visual identification alone cannot distinguish these reliably.

Field identification & locations

Commonly found in quartz veins, hydrothermal deposits, weathered igneous rocks, and stream gravels worldwide. A hardness test, translucency check, streak test, and close inspection for banding or granular texture can refine identification.