sedimentary

Red Jasper Pebble

Microcrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron oxide inclusions, waxy to dull luster, cryptocrystalline or microcrystalline structure, conchoidal fracture with no true cleavage, specific gravity around 2.65.

Identified August 2, 2026More sedimentary →

Explore Red Jasper Pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through the accumulation of silica-rich sediments or volcanic ash on ocean floors, often chemically precipitated in marine environments. Over geological time, pressure and low-grade metamorphism or diagenesis cement the silica into a dense rock.

Uses & applications

Used primarily in ornamental carvings, cabochons for jewelry, tumbled stones, and decorative aggregate.

Geological facts

Jasper has been used since ancient times for amulets, seals, and tools. Red jasper specifically was valued in ancient Egypt and by Native American tribes for its grounding energy and protective qualities.

Field identification & locations

Found easily in riverbeds, glacial tills, and marine beaches where wave action has smoothed and rounded the resistant quartz pebbles. Easily identified by its hardness, opacity, waxy luster, and distinctive red color.