Sandstone (Banded)

Physical Properties

Hardness: 6-7 (Mohs scale); Color: Tan, beige, brown with visible banding; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None, breaks across grains; Specific gravity: 2.2-2.8

Formation & Geological History

Formed by the accumulation and lithification of mineral particles or rock fragments. The visible layers represent different depositional events or changes in mineral concentrate over millions of years, often in riverbeds, deserts, or coastal environments.

Uses & Applications

Used primarily as a building material, decorative stone, or for making grindstones. In smaller specimens, it is collected for its aesthetic 'picture stone' qualities.

Geological Facts

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. The famous Red Rocks of Colorado and the structures of Petra are carved into sandstone formations.

Field Identification & Locations

Identify by its gritty, sandpaper-like feel and visible layering (stratification). It can be found globally in outcrops, riverbeds, and cliffs. Collectors look for unique patterns like 'Wonderstone' or Liesegang rings.

Identified on: 5/6/2026

Mode: Standard