sedimentary

Quartz-veined Sandstone

Quartzite-veined Arenite / SiO2 and quartz sand

Hardness: 7 on Mohs scale (for quartz veins), 6-7 for sandstone matrix. Color: Brownish-tan host rock with contrasting white/translucent quartz bands. Luster: Vitreous to dull earthy. Crystal structure: Trigonal (quartz veins), clastic granular (sandstone). Cleavage: None (fractures conchoidally).…

Hardness: 7 on Mohs scale (for quartz veins), 6-7 for sandstone matrix
Luster: Vitreous to dull earthy

Identified July 29, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (sandstone) which was later fractured by tectonic forces allowing hydrothermal fluids rich in silica to precipitate quartz veins filling the cracks.

Uses & applications

Used primarily for educational and ornamental purposes, as a pocket specimen for rock collectors, and occasionally in landscaping or stone masonry depending on size.

Geological facts

Vein structures like this provide a clear relative timeline of geological events: the host sedimentary rock had to form first, become consolidated, fracture due to stress, and then be healed by mineral-rich hydrothermal fluids circulating through the fractures.

Field identification & locations

Easily identified in the field by contrasting parallel or intersecting white mineral veins running through a granular sedimentary matrix. Commonly found in regions with ancient sedimentary basins that experienced later hydrothermal or tectonic activity.

Other sedimentary specimens

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Sandstone or Siltstone

Arenite (if sandstone)

Sedimentary

Sedimentary Sandstone

Arenite (Sedimentary Rock)

sedimentary

Fossiliferous Concretion

Septarian Concretion containing Brachiopods/Crinoids

fossil

Banded Siltstone / Mudstone Pebble

Siltstone / Argillite

sedimentary

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)

sedimentary

Shale

Shale (clastic sedimentary rock)

sedimentary