sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5 - 7 on the Mohs scale; Color: Brick red to deep red; Luster: Vitreous to waxy/dull; Crystal Structure: Microcrystalline aggregate (Trigonal/Hexagonal); Cleavage: None, exhibits conchoidal fracture

Hardness: 6
Color: Brick red to deep red
Luster: Vitreous to waxy/dull

Identified July 22, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich solutions along with fine iron oxide (hematite) impurities, often associated with hydrothermal veins, volcanic deposits, and sedimentary layers

Uses & applications

Used primarily for lapidary work, cabochons, carved ornaments, tumbled stones, costume jewelry, and decorative landscaping stones

Geological facts

Red jasper was favored in ancient times for talismans and seals. Ancient Egyptians associated its vibrant red color with the blood of Isis, while native cultures used it for protection and rain-making rituals.

Field identification & locations

Identified in the field by its distinctive brick-red opaque color, high hardness (cannot be scratched by a steel blade), smooth conchoidal fracture surfaces, and complete opacity even on thin edges. Common worldwide, especially in South Africa, Brazil, India, Australia, and the western United States.