sedimentary

Quartz-Veined Sandstone

Quartz-veined Arenite

Hardness: 6-7 (Mohs scale), Color: tan to grayish-green matrix with white vein, Luster: dull to earthy matrix with vitreous vein, Texture: fine-grained sandy texture with a crystalline mineral band.

Identified July 17, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: tan to grayish-green matrix with white vein, Luster: dull to earthy matrix with vitreous vein, Texture: fine-grained sandy texture with a crystalline mineral band.

Formation & geological history

Formed through the lithification of sand-sized particles (primarily quartz and feldspar). The white vein was created later by hydrothermal fluids depositing silica (quartz) into a fracture or crack in the rock during tectonic activity.

Uses & applications

Commonly used as construction aggregate, road base, and in some cases for decorative landscaping. Not generally used in jewelry.

Geological facts

The white line is a 'quartz vein'. These veins can sometimes contain other minerals like gold or pyrite, though in water-worn river rocks like this one, it is usually pure quartz.

Field identification & locations

Can be identified by the distinct textural difference between the host sedimentary rock and the hard, crystalline white band. Commonly found in riverbeds, glacial tills, and coastal areas.