sedimentary

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to waxy (when polished); Crystal Structure: Hexagonal (trigonal microcrystalline); Cleavage: None (conchoidal fracture); Opaque.

Hardness: 6
Color: Brick red to brownish-red
Luster: Vitreous to waxy (when polished)

Identified July 10, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed primarily through the deposition of silica from hydrothermal solutions or in sedimentary environments where iron oxides (like hematite) are present to provide the red coloration.

Uses & applications

Extensively used in lapidary work for cabochons, beads, and carvings. Historically used for seals, talismans, and as an ornamental stone in architecture.

Geological facts

Red Jasper has been used since antiquity, appearing in Minoan Crete and ancient Egypt as a stone of protection and endurance. It is technically an impure variety of silica.

Field identification & locations

Identified by its deep red color, opacity, and ability to scratch glass. Found globally, prominent sources include India, Brazil, South Africa, and the United States (western states).