sedimentary

Red Sandstone with Quartz Vein

Sedimentary Quartz Arenite with SiO2 vein

Hardness of 6-7 on Mohs scale due to quartz content. Reddish-brown color with a distinct lighter quartz band, dull to vitreous luster.

Identified October 23, 2026More sedimentary →

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Physical properties

Hardness of 6-7 on Mohs scale due to quartz content. Reddish-brown color with a distinct lighter quartz band, dull to vitreous luster.

Formed from the accumulation and cementation of mineral particles or rock fragments over millions of years, often in desert or beach environments.

Frequently used as decorative stones, carved into pendants or jewelry, and used in building construction.

The distinct lighter band is a quartz or calcite mineral vein that filled a fracture in the rock post-formation.

Easily identified by its granular texture and visible sedimentary banding. Common worldwide in ancient riverbeds and desert regions.

Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion

Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone or Siltstone

Arenite (if sandstone)

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)