sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Deep red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Deep red to brownish-red
Luster: Vitreous to dull

Identified July 4, 2026More sedimentary →

Explore Red Jasper 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 from silica-rich fluids depositing in cracks or cavities in sedimentary or metamorphic environments, with its characteristic red color coming from high iron content. It is often found in prehistoric volcanic ash beds.

Uses & applications

Primarily used in jewelry, lapidary arts, and stone carvings. Historically used for making tools like scrapers and arrowheads due to its conchoidal fracture.

Geological facts

Red Jasper has been used since antiquity; it was known as the 'rain bringer' in some indigenous cultures and was frequently used in the seals of ancient Babylon and Egypt.

Field identification & locations

Identify by its opaque red color and high hardness (it cannot be scratched by a steel knife). Commonly found in river beds, beaches, and desert areas worldwide.