River Stone (River Pebbles)

Physical Properties

Hardness: 6-7 (Mohs); Color: Tan, brown, grey, and ochre; Luster: Dull to waxy; Texture: Smooth, rounded, water-worn; SG: ~2.65

Formation & Geological History

Formed through the erosion of larger rock formations, transported by water over long periods where abrasive action smooths the edges. Age ranges from thousands to millions of years depending on the parent material.

Uses & Applications

Landscaping, decorative gardening, construction aggregate, drainage systems, and walkway paving.

Geological Facts

The smooth, rounded shape is a result of fluvial abrasion, a process where rocks collide and grind against each other in moving water environments. Large deposits are often found in ancient riverbeds.

Field Identification & Locations

Identify by the distinct rounded edges and variety of colors in a single deposit. Frequently found in stream beds, floodplains, and glacial outwash plains.

Identified on: 4/19/2026

Mode: Standard