sedimentary
Sandstone with Quartz Veining
Arenite with SiO2 veins
Hardness: 6-7 (Mohs scale); Color: Dull gray to tan Matrix with white veins; Luster: Dull/Earthy matrix with Vitreous veins; Structure: Clastic with crystalline veins; Cleavage: None
- Hardness
- 6-7 (Mohs scale)
- Color
- Dull gray to tan Matrix with white veins
- Luster
- Dull/Earthy matrix with Vitreous veins
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Dull gray to tan Matrix with white veins; Luster: Dull/Earthy matrix with Vitreous veins; Structure: Clastic with crystalline veins; Cleavage: None
Formation & geological history
Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments. The white veins are secondary hydro-thermal silica deposits that filled fractures at a later geological stage.
Uses & applications
Common sandstone is used in construction as aggregate, paving stones, and for architectural facades. This specific weathered specimen is primarily of interest for basic geology education or landscaping.
Geological facts
Sandstone makes up about 20-25% of all sedimentary rocks. The presence of quartz veins usually indicates the rock was subjected to tectonic stress and fluid movement deep underground before being uplifted.
Field identification & locations
Identify in the field by its gritty texture (feels like sandpaper) and cross-cutting white lines that cannot be scratched by a steel blade. Commonly found in riverbeds, canyons, and mountainous outcrops.
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