Sandstone (likely with Quartz Veining)

Physical Properties

Hardness: 6-7 (Mohs scale); Color: Tan, beige, grey; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2–2.8

Formation & Geological History

Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) of sand size. This specimen displays quartz veining, suggesting later hydrothermal activity where mineral-rich water filled fractures.

Uses & Applications

Used widely in construction as a building stone, in the manufacture of glass, and as decorative landscaping stone.

Geological Facts

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. It is a major reservoir for groundwater and petroleum because of its porosity.

Field Identification & Locations

Identify by its gritty texture (feels like sandpaper). Look for layering (bedding planes) and check for hardness; it should be able to scratch glass if quartz-rich. Common in desert environments and ancient riverbeds.

Identified on: 4/14/2026

Mode: Standard