sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91

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

Identified May 24, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91

Formation & geological history

Formed when silica-rich fluids settle in sedimentary environments or volcanic ash deposits, with high iron oxide (hematite) content providing the red pigment throughout the crystallization process.

Uses & applications

Primarily used for lapidary arts, jewelry (cabochons, beads), decorative carvings, and as a popular tumbled stone for collectors and metaphysical practices.

Geological facts

Red Jasper was known as the 'stone of endurance' in ancient times and has been used since antiquity for royal seals and amulets. It is an opaque variety of chalcedony.

Field identification & locations

Identify by its deep red color, high hardness (cannot be scratched by a steel blade), and smooth, conchoidal fracture. Commonly found in India, Brazil, USA (Southwest), and South Africa.