mineral

Weathered quartz-bearing rock

Quartz-rich vein material; likely quartz with iron oxides and feldspar, exact rock type uncertain

AI-generated identification · may be incorrect

Hardness about 6–7 Mohs; cream, yellow, brown, and white coloration; vitreous to dull luster; irregular fracture with no obvious cleavage. Yellow-brown staining is characteristic of limonite/goethite iron oxides.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as hydrothermal vein material or weathered silicic rock, with iron-rich fluids or oxidation producing the yellow-brown coating. Its precise geological age and host-rock history cannot be determined from the image alone.

Uses & applications

Primarily a collecting specimen; quartz-rich material may be used decoratively, while iron-stained quartz has limited lapidary value unless translucent or attractively patterned.

Geological facts

The yellow color is probably iron-oxide staining rather than natural golden coloration of citrine. A glassy edge, ability to scratch ordinary glass, and lack of fizzing in dilute acid would support quartz identification.

Field identification & locations

Common in quartz veins, granitic terrains, and oxidized mineral deposits worldwide; likely locations include the western United States and other crystalline-rock regions. Estimated value: $1–$10 as an ordinary hand specimen, potentially $20–$50 if unusually crystalline or attractive.