Sandstone

Physical Properties

Mohs Hardness: 6-7; Color: Tan, brown, reddish; Luster: Dull/Earthy; Crystal Structure: Clastic grains; Cleavage: None; Specific Gravity: 2.2-2.8.

Formation & Geological History

Formed by the accumulation and lithification of sand-sized mineral particles or rock fragments across geological eras, primarily in desert, river, or coastal environments.

Uses & Applications

Used extensively in construction as building stone, as a source of silica for glass manufacturing, and as a reservoir rock for oil and natural gas.

Geological Facts

Sandstone represents about 20% of all sedimentary rocks on Earth and can preserve incredible fossil records and ripple marks from ancient water bodies.

Field Identification & Locations

Identify by its gritty, sandpaper-like texture and visible mineral grains. It is commonly found in sedimentary basins and arid regions globally.

Identified on: 5/3/2026

Mode: Standard