sedimentary

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red; Luster: Vitreous to waxy; Crystal structure: Hexagonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish red
Luster: Vitreous to waxy

Identified April 1, 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

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red; Luster: Vitreous to waxy; Crystal structure: Hexagonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed from the deposition of silica-rich fluids in volcanic or sedimentary environments. The red color comes from high concentrations of iron oxide (hematite) during its formation. It is often associated with ancient banded iron formations.

Uses & applications

Commonly used in jewelry (beads, cabochons), lapidary arts, ornamental carving, and as a metaphysical healing stone. Historically used for making tools and seals.

Geological facts

Jasper is an opaque variety of chalcedony. In ancient times, it was considered a 'rain bringer' and was mentioned in many historical texts for its grounding properties. It is often found as smooth pebbles in riverbeds.

Field identification & locations

Identify by its deep red color, total opacity (even when held to light), and conchoidal fracture. It will easily scratch glass but cannot be scratched by a steel knife. Common in South Africa, Brazil, and the USA.