sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Brick red to deep brownish-red; Luster: Dull to vitreous when polished; Crystal structure: Trigonal (microcrystalline quartz); Cleavage: None, exhibits conchoidal fracture; Specific gravity: 2.58-2.91.

Hardness: 6
Color: Brick red to deep brownish-red
Luster: Dull to vitreous when polished

Identified July 22, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when fine particulate silica precipitates from volcanic fluids or groundwater within sedimentary beds, incorporating abundant microcrystalline iron oxide (hematite) which imparts the characteristic deep red coloration.

Uses & applications

Widely used as an ornamental stone, for lapidary work, cabochons, carvings, decorative landscaping, and crystal healing/collecting practices.

Geological facts

Ancient civilizations considered red jasper a sacred stone of strength and protection. In ancient Egypt, it was associated with the blood of Isis and carved into protective amulets.

Field identification & locations

Identified in the field by its distinctive brick-red color, dull unpolished surface, opaque transparency, and high hardness (scratches glass). Commonly found in South Africa, India, Brazil, Australia, and the western United States.