sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs Scale); Color: Red, brownish-red; Luster: Dull to vitreous; Crystal Structure: Hexagonal (trigonal) microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Red, brownish-red
Luster: Dull to vitreous

Identified May 31, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs Scale); Color: Red, brownish-red; Luster: Dull to vitreous; Crystal Structure: Hexagonal (trigonal) microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed when silica-rich fluids permeate volcanic or sedimentary rocks, often in hydrothermal environments or through the replacement of volcanic ash. Its red color is derived from high iron content.

Uses & applications

Commonly used in jewelry (cabochons, beads), decorative objects, carvings, and as a popular stone for tumbling and meditation practices.

Geological facts

Red Jasper was historically known as the stone of endurance and was often used in ancient amulets and warrior talismans. It is an opaque variety of chalcedony.

Field identification & locations

Identify by its deep red color, opacity, and smooth, conchoidal fracture. It is found in many locations worldwide, including India, Brazil, USA, and South Africa.