sedimentary
Sandstone with Quartz Vein
Arenite with hydrothermal quartz intrusion
Hardness: 6-7 (Mohs scale); Color: Pale yellow to tan; Luster: Dull/earthy matrix with vitreous vein; Crystal structure: Clastic (matrix), Trigonal (vein); Cleavage: None
- Hardness
- 6-7 (Mohs scale)
- Color
- Pale yellow to tan
- Luster
- Dull/earthy matrix with vitreous vein
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Pale yellow to tan; Luster: Dull/earthy matrix with vitreous vein; Crystal structure: Clastic (matrix), Trigonal (vein); Cleavage: None
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments over millions of years (Paleozoic to Cenozoic). The white line is a secondary quartz vein formed when silica-rich fluids filled a fracture.
Uses & applications
Commonly used in construction as a building stone or paving material. Specimens with interesting veins are popular for amateur geology collections.
Geological facts
Sandstone can preserve fossil footprints and ripple marks from ancient riverbeds or deserts. The quartz vein indicates the rock underwent tectonic stress that caused cracking.
Field identification & locations
Identify by its gritty, sandpaper-like texture and visible mineral grains. Often found in canyons, beaches, and desert outcrops. For collectors, the presence of a distinct vein adds visual interest.
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