sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91.

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

Identified June 2, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91.

Formation & geological history

Formed through the deposition of silica from water-rich environments or volcanic ash, often associated with banded iron formations. The red color is derived from high hematite (iron) content. It is typically hundreds of millions of years old.

Uses & applications

Used primarily as decorative gemstones for jewelry (cabochons), talismans, lapidary carvings, and ornamental stones. Historically used for making tools and seals.

Geological facts

Ancient Egyptians used red jasper in amulets to represent the fertilizing blood of Isis. It is known as a stone of endurance and nurturing in various cultural mythologies.

Field identification & locations

Identify by its deep red color, opaque transparency, and the fact that it cannot be scratched by a steel knife. Commonly found in riverbeds or desert areas in India, Brazil, USA, and South Africa.